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1. Retention of Arsenic by Hydroxy-Aluminum on Surfaces of Micaceous Mineral Colloids

Author:
P. M. Huang
Source:
Soil Science Society of America journal 1975 v.39 no.2 pp. 271-274
ISSN:
0361-5995
Subject:
adsorption; aluminum; arsenates; arsenic; biotite; colloids; energy; ions; mica; muscovite; pH; particle size; sodium chloride; vermiculite
Abstract:
... This study was carried out to examine the relative significance of As retention by hydroxy-Al on external and interlamellar surfaces of micaceous mineral colloids. Depletion of K from muscovite and biotite decreased As retention. This effect was attributed to the exclusion of arsenate ions by the K-depleted layers. Hydroxy-Al in the interlamellar spaces of vermiculite and K-depleted micas was not ...
DOI:
10.2136/sssaj1975.03615995003900020016x

2. Effect of pH on Adsorption of Arsenic and Selenium from Landfill Leachate by Clay Minerals

Author:
R. R. Frost; R. A. Griffin
Source:
Soil Science Society of America journal 1977 v.41 no.1 pp. 53-57
ISSN:
0361-5995
Subject:
adsorption; anions; arsenic; kaolinite; landfill leachates; landfills; montmorillonite; pH; protons; selenium; surface area; wastes
Abstract:
... Adsorption of As(V), As(III), and Se(IV) anions from municipal landfill leachate solutions by the clay minerals kaolinite and montmorillonite is strongly dependent upon solution pH. The H₂AsO₄⁻ and HSeO⁻₃ ions are the apparent primary As(V) and Se(IV) species being adsorbed by the clay minerals. Activation of the anion adsorption sites on the clay minerals by H⁺ ions is important in determining th ...
DOI:
10.2136/sssaj1977.03615995004100010019x

3. Effect of Sewage Sludge on Trace Element Mobility in Soils

Author:
R. G. Gerritse; R. Vriesema; J. W. Dalenberg; H. P. de Roos
Source:
Journal of environmental quality 1982 v.11 no.3 pp. 359-364
ISSN:
0047-2425
Subject:
adsorption; antimony; arsenic; barium; beryllium; bismuth; boron; cadmium; cesium; chromium; cobalt; copper; equations; fluorine; ionic strength; iron; lead; manganese; mercury; molybdenum; nickel; organic compounds; pH; phosphorus; prediction; sandy loam soils; sandy soils; selenium; sewage; sewage sludge; silver; soil organic matter; soil solution; strontium; technetium; tin; vanadium; zinc
Abstract:
... Adsorption of Be, F, B, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Sr, Mo, Tc, Ag, Cd, Sn, Sb, Cs, Ba, Hg, Pb, Bi, and P was measured in a sandy soil and a sandy loam soil at concentration levels closely corresponding to those to be expected for field conditions. Mobilities of the elements in the soils were calculated from the adsorption data. Of the trace elements studied, F, B, and Tc were found to ...
DOI:
10.2134/jeq1982.00472425001100030007x

4. Adsorption of Phosphate, Arsenate, Methanearsonate, and Cacodylate by Lake and Stream Sediments: Comparisons with Soils

Author:
R. D. Wauchope; L. L. Mc Dowell
Source:
Journal of environmental quality 1984 v.13 no.3 pp. 499-504
ISSN:
0047-2425
Subject:
MSMA (herbicide); adsorption; aluminum; aluminum oxide; arsenates; arsenic; cacodylic acid; calcium; clay; clay fraction; floodplains; iron; iron oxides; lakes; pH; phosphates; sediments; slurries; streams; Mississippi River
Abstract:
... The adsorption of phosphate, arsenate, MSMA (sodium methanearsonate) and cacodylic acid (hydroxydimethylarsine oxide) by 14 sediments from streams and lakes of the Mississippi River alluvial flood plain was measured using a phosphate fixation test and also dilate (1 g/100 mL) sediment-water slurries at 50 and 500 µg/L P or As. The fixation experiment results were similar to a previous study with s ...
DOI:
10.2134/jeq1984.00472425001300030034x

5. Relationship between adsorption of arsenic(III) and boron by soil and soil properties

Author:
Sakata, M.
Source:
Environmental science & technology 1987 v.21 no.11 pp. 1126-1130
ISSN:
1520-5851
Subject:
soil pollution; arsenic; boron; adsorption; fly ash; Japan
DOI:
10.1021/es00164a016

6. Geochemical Factors Controlling the Mobilization of Inorganic Constituents from Fossil Fuel Combustion Residues: II. Review of the Minor Elements

Author:
L. E. Eary; Dhanpat Rai; S. V. Mattigod; C. C. Ainsworth
Source:
Journal of environmental quality 1990 v.19 no.2 pp. 202-214
ISSN:
0047-2425
Subject:
adsorption; arsenic; barium; boron; cadmium; chromium; copper; desorption; fossil fuels; fuel combustion; leachates; leaching; lead; manganese; mercury; minor elements; molybdenum; nickel; selenium; solubility; strontium; thermodynamics; vanadium; waste disposal; wastes; weathering; zinc
Abstract:
... Past studies of the environmental aspects of fossil fuel waste disposal have focused on determining elemental concentrations, elemental distributions, and empirical rates of elemental extraction. The concentration data for the minor elements (i.e., As, B, Ba, Cd, Cr, Cu, Pb, Mn, Hg, Mo, Ni, Se, Sr, V, and Zn) are extremely variable and are dependent on fuel composition and combustion processes. St ...
DOI:
10.2134/jeq1990.00472425001900020005x

7. Chemical Composition of Ochreous Precipitates from Ohio Coal Mine Drainage

Author:
R. L. Winland; S. J. Traina; J. M. Bigham
Source:
Journal of environmental quality 1991 v.20 no.2 pp. 452-460
ISSN:
0047-2425
Subject:
adsorption; aluminum; arsenic; barite; barium; chromium; coal; cobalt; copper; coprecipitation; crystallization; drainage; drainage water; effluents; ionic strength; iron; jarosite; manganese; organic matter; oxides; pH; partition coefficients; silicon; solubility; zinc; Ohio
Abstract:
... Ochreous precipitates and associated solutions were collected from waters draining abandoned coal works at 28 locations in eastern Ohio. Major and trace element contents of the precipitates were determined, and comparisons were made with source solutions to evaluate the effects of pH, organic C, and ionic strength on solid-phase composition and trace metal distribution. The pH and calcalated ionic ...
DOI:
10.2134/jeq1991.00472425002000020019x

8. Ion chromatographic method for determination of oxyanions in solutions equilibrated with soils

Author:
Karmarkar, S.V.; Tabatabai, M.A.
Source:
Communications in soil science and plant analysis 1991 v.22 no.13/14 pp. 1383-1395
ISSN:
0010-3624
Subject:
soil analysis; anions; oxides; separation; detection; ion exchange chromatography; soil solution; adsorption; extraction; phosphates; arsenic; selenium; molybdenum
DOI:
10.1080/00103629109368499

9. Simultaneous Determination of Arsenite, Arsenate, Selenite, and Selenate by Suppressed Ion Chromatography

Author:
S.L. McGeehan; D.V. Naylor
Source:
Journal of environmental quality 1992 v.21 no.1 pp. 68-73
ISSN:
0047-2425
Subject:
adsorption; arsenates; arsenic; arsenites; chlorine; detection limit; detectors; electrochemistry; fluorine; ion exchange chromatography; nitrate nitrogen; oxyanions; selenates; selenites; sodium bicarbonate; sodium carbonate; soil solution; spectroscopy
Abstract:
... Studies of chemical processes involving As and Se in soil solution require accurate determination of arsenite, arsenate, selenite, and selenate. Many of the currently used speciation techniques rely on indirect measurement of one or more species. Direct, simultaneous measurement of these As and Se ionic species was achieved using a commercially available suppressed ion chromatography system and a ...
DOI:
10.2134/jeq1992.00472425002100010010x

10. Statistical Evaluation of Arsenic Adsorption Data Using Linear-Plateau Regression Analysis

Author:
S. L. McGeehan; D. V. Naylor; B. Shafii
Source:
Soil Science Society of America journal 1992 v.56 no.4 pp. 1130-1133
ISSN:
0361-5995
Subject:
adsorption; analysis of covariance; arsenates; arsenic; arsenites; chromatography; regression analysis; soil properties; Idaho
Abstract:
... Few studies have utilized a statistical approach for comparisons of adsorption data. Our objective was to evaluate the suitability of linear-plateau regression analysis to identify the As adsorption plateau and facilitate statistical comparison of As-adsorption rates and maxima. Three northern Idaho soils exhibiting a range in As-adsorption capacity were tested. Batch techniques with ion chromatog ...
DOI:
10.2136/sssaj1992.03615995005600040020x

11. Modeling Competitive Adsorption of Arsenate with Phosphate and Molybdate on Oxide Minerals

Author:
Bruce A. Manning; S. Goldberg
Source:
Soil Science Society of America journal 1996 v.60 no.1 pp. 121-131
ISSN:
0361-5995
Subject:
simulation models; gibbsite; arsenic; goethite; molybdates; soil analysis; anions; arsenates; phosphates; pH; adsorption
Abstract:
... The mobility of As in soils depends on several factors including redox potential, soil mineralogy, pH, and the presence of other oxyanions that compete with As for soil retention sites. We investigated the effects of pH and competing anions on the adsorption of arsenate [As(V)] on α-FeOOH (goethite) and γ-Al(OH)₃(gibbsite). Batch equilibrium As(V) adsorption experiments were conducted with P and M ...
DOI:
10.2136/sssaj1996.03615995006000010020x

12. Adsorption of Trace Metals by Tension Lysimeters: Nylon Membrane vs. Porous Ceramic Cup

Author:
W. W. Wenzel; R. S. Sletten; A. Brandstetter; G. Wieshammer; G. Stingeder
Source:
Journal of environmental quality 1997 v.26 no.5 pp. 1430-1434
ISSN:
0047-2425
Subject:
adsorption; arsenic; cadmium; ceramics; chromium; cobalt; copper; laboratory experimentation; lead; lysimeters; manganese; mechanical properties; nickel; nylon; pH; soil; zinc
Abstract:
... Lysimeters constructed of polyacrylic and fitted with either a porous nylon membrane or a porous ceramic cup were tested for their adsorption characteristics with respect to Pb, Cr, Cu, As, Cd, Co, Mn, Ni, and Zn. Laboratory tests were conducted at pH 4, 5, and 6 using metal concentrations that are representative of natural soil solutions. The ceramic lysimeters significantly lowered the concentra ...
DOI:
10.2134/jeq1997.00472425002600050033x

13. Adsorption and oxidation of arsenite on goethite

Author:
Xiaohua Sun; Harvey E. Doner
Source:
Soil science 1998 v.163 no.4 pp. 278-287
ISSN:
0038-075X
Subject:
arsenic; toxicity; bioavailability; arsenates; arsenites; chemical speciation; adsorption; oxidation; goethite; birnessite; soil pH; manganese; iron; solubility; biogeochemistry
Abstract:
... Arsenic toxicity, mobility, and bioavailability in soil-water systems are highly dependent on its oxidation states and chemical species. In this study, both indirect (FTIR) and direct (X-ray Absorption Near Edge Structure (XANES) spectroscopic techniques were applied to investigate the adsorption and oxidation of As(III) on the surface of goethite. The results indicate that at low pH, the As(V)/As ...
DOI:
10.1097/00010694-199804000-00003

14. Arsenic Sorption in Phosphate-Amended Soils during Flooding and Subsequent Aeration

Author:
J. G. Reynolds; D. V. Naylor; S. E. Fendorf
Source:
Soil Science Society of America journal 1999 v.63 no.5 pp. 1149-1156
ISSN:
0361-5995
Subject:
X-ray absorption spectroscopy; adsorption; aeration; aerobic conditions; anaerobic conditions; arsenic; calcium; hydric soils; iron; iron oxyhydroxides; manganese; nitrogen; oxides; sodium phosphate
Abstract:
... Phosphate enhances the mobility of As in well-aerated soils by competing for adsorption sites. Phosphate and As may also coexist in large concentrations in hydric soils, and the influence of P on As in anaerobic systems is largely unknown. To determine the effects of P on As dynamics during a soil flooding and aeration cycle, samples of two soils were amended with Na₂HAsO₄ and Na₂HPO₄ and incubate ...
DOI:
10.2136/sssaj1999.6351149x

15. Acacia nilotica L. bark removes toxic elements from solution: corroboration from toxicity bioassay using Salix viminalis L. in hydroponic system

Author:
Prasad, M.N.V.; Greger, M.; Landberg, T.
Source:
International journal of phytoremediation 2001 v.3 no.3 pp. 289-300
ISSN:
1522-6514
Subject:
water pollution; copper; phytotoxicity; lead; arsenic; cadmium; bioassays; hydroponics; Salix viminalis; nickel; bark; chromium; Vachellia nilotica; powders; adsorption
DOI:
10.1080/15226510108500060

16. Adsorption of Arsenate (V) and Arsenite (III) on Goethite in the Presence and Absence of Dissolved Organic Carbon

Author:
M. Grafe; M. J. Eick; P. R. Grossl
Source:
Soil Science Society of America journal 2001 v.65 no.6 pp. 1680-1687
ISSN:
0361-5995
Subject:
United States Environmental Protection Agency; adsorption; arsenates; arsenic; arsenites; bioavailability; citric acid; dissolved organic carbon; drinking water; environmental fate; fulvic acids; goethite; humic acids; iron oxides; iron oxyhydroxides; ligands; moieties; pH; peat; politics; polymers; rivers; soil
Abstract:
... The environmental fate of arsenic (As) is of utmost importance as the public and political debate continues with the USEPA's recent proposal to tighten the As drinking water standard from 50 to 10 μg L⁻¹ In natural systems, the presence of dissolved organic C (DOC) may compete with As for adsorption sites on mineral surfaces, hence increasing its potential bioavailability. Accordingly, the adsorpt ...
DOI:
10.2136/sssaj2001.1680

17. Effect of pH, phosphate and oxalate on the adsorption/desorption of arsenate on/from goethite

Author:
Liu, F.; De Cristofaro, A.; Violante, A.
Source:
Soil science 2001 v.166 no.3 pp. 197-208
ISSN:
0038-075X
Subject:
goethite; arsenic; anions; adsorption; desorption; pH; oxalic acid; phosphates
DOI:
10.1097/00010694-200103000-00005

18. Residence Time Effects on Arsenate Adsorption/Desorption Mechanisms on Goethite

Author:
S.E. O'Reilly; D.G. Strawn; D.L. Sparks
Source:
Soil Science Society of America journal 2001 v.65 no.1 pp. 67-77
ISSN:
0361-5995
Subject:
X-ray absorption spectroscopy; adsorption; arsenates; arsenic; chemical bonding; desorption; goethite; iron; pH; soil; sulfates
Abstract:
... In order to make sound decisions regarding arsenate contamination in soil and water environments, it is necessary to have a thorough understanding of the mechanisms of arsenate sorption and desorption over extended periods. The major objectives of this study were to determine the effects of aging or residence time on the kinetics of arsenate sorption and desorption on goethite, and to combine spec ...
DOI:
10.2136/sssaj2001.65167x

19. Adsorption of Arsenate and Arsenite on Ferrihydrite in the Presence and Absence of Dissolved Organic Carbon

Author:
Markus Grafe; Matthew J. Eick; Paul R. Grossl; Amy M. Saunders
Source:
Journal of environmental quality 2002 v.31 no.4 pp. 1115-1123
ISSN:
1537-2537
Subject:
adsorption; arsenic; arsenites; citric acid; dissolved organic carbon; ferrihydrite; fulvic acids; goethite; humic acids; pH; peat; rivers
Abstract:
... The adsorption of As(V) and As(III) on synthetic two-line ferrihydrite in the presence and absence of a peat humic acid (HAₚ), Suwannee River fulvic acid (FA), or citric acid (CA) was investigated. Previous work with goethite has demonstrated the ability of dissolved organic carbon (DOC) to decrease As(V) and As(III) adsorption. The results obtained demonstrate that As(V) adsorption on ferrihydrit ...
DOI:
10.2134/jeq2002.1115

20. Chemistry of Inorganic Arsenic in Soils

Author:
E. Smith; R. Naidu; A. M. Alston
Source:
Journal of environmental quality 2002 v.31 no.2 pp. 557-563
ISSN:
1537-2537
Subject:
Alfisols; Oxisols; Vertisols; adsorption; arsenic; bioavailability; calcium; charge characteristics; groundwater contamination; iron; iron oxides; polluted soils; risk; sodium; Australia
Abstract:
... There are more than 10000 arsenic (As) contaminated sites in Australia. The ability of soils at these contaminated sites to sorb As is highly variable and appreciable amounts of As have been recorded in the subsurface soils. The potential risk of surface and ground water contamination by As at these sites is a major environmental concern. Factors that influence adsorption capacity of soils influen ...
DOI:
10.2134/jeq2002.5570

21. Competitive Adsorption of Arsenate and Arsenite on Oxides and Clay Minerals

Author:
Sabine Goldberg
Source:
Soil Science Society of America journal 2002 v.66 no.2 pp. 413-421
ISSN:
0361-5995
Subject:
adsorption; aluminum; aluminum oxide; arsenates; arsenic; arsenites; batch systems; capacitance; clay; illite; iron oxides; kaolinite; montmorillonite; pH
Abstract:
... Arsenic adsorption on amorphous Al and Fe oxides and the clay minerals, kaolinite, montmorillonite, and illite was investigated as a function of solution pH and As redox state, i.e., arsenite [As(III)] and arsenate [As(V)]. Arsenic adsorption experiments were carried out in batch systems to determine adsorption envelopes, amount of As(III), As(V), or both adsorbed as a function of solution pH per ...
DOI:
10.2136/sssaj2002.4130

22. Effect of water extract of compost on the adsorption of arsenate by two calcareous soils

Author:
Lin, H.T.; Wang, M.C.; Li, G.C.
Source:
Water, air, and soil pollution 2002 v.138 no.1/4 pp. 359-374
ISSN:
0049-6979
Subject:
calcareous soils; alluvial soils; arsenic; anions; adsorption; composts; sorption isotherms; equations; extracts

23. Kinetics of Arsenic Adsorption on Goethite in the Presence of Sorbed Silicic Acid

Author:
Catherine A. Waltham; Matthew J. Eick
Source:
Soil Science Society of America journal 2002 v.66 no.3 pp. 818-825
ISSN:
0361-5995
Subject:
adsorption; arsenates; arsenic; arsenites; deprotonation; goethite; iron oxides; ligands; reaction kinetics; redox potential; silicic acid; soil pH; toxicity; variable charge
Abstract:
... The potential toxicity and availability of As in the environment is dependent on several factors including redox potential, pH, and the presence of ligands that can compete for adsorption sites on mineral surfaces. Silicic acid is a ligand ubiquitous in natural systems and strongly chemisorbs to Fe oxides. However, there are relatively few studies examining its influence on As adsorption on Fe oxi ...
DOI:
10.2136/sssaj2002.8180

24. Residence time effects on arsenate surface speciation at the aluminum oxide-water interface

Author:
Yuji Arai; D. L. Sparks
Source:
Soil science 2002 v.167 no.5 pp. 303-314
ISSN:
0038-075X
Subject:
arsenic; chemical speciation; anions; aluminum oxide; surfaces; adsorption; desorption
Abstract:
... Bioavailability of metals/metalloids is often rate limited by contact time (i.e., residence time) in soils and sediments, resulting in irreversible reactions. The fate and transport of the contaminants must be predicted/modeled not only on short-term (<48 h) adsorption/desorption studies but also on long-term (months-years) reactions. However, there is very little information on the long-term effe ...
DOI:
10.1097/00010694-200205000-00001

25. Adsorption and Transport of Arsenic(V) in Experimental Subsurface Systems

Author:
L. Elizabeth Williams; Mark O. Barnett; Timothy A. Kramer; Joel G. Melville
Source:
Journal of environmental quality 2003 v.32 no.3 pp. 841-850
ISSN:
1537-2537
Subject:
adsorption; arsenic; equations; ferric oxide; laboratory experimentation; models; pH; soil; sorption isotherms
Abstract:
... The adsorption and transport of As(V) in a heterogeneous, iron oxide–containing soil was investigated in batch and column laboratory experiments. The As(V) adsorbed rapidly to the soil over the first 48 h, but continued to adsorb slowly over the next several weeks, clearly indicating the potential for rate-limited transport. The equilibrium As(V) adsorption isotherm was markedly nonlinear, further ...
DOI:
10.2134/jeq2003.8410
PubMed:
12809285

26. Arsenate-induced phosphate release from soils and its effect on plant phosphorus

Author:
Lambkin, D.C.; Alloway, B.J.
Source:
Water, air, and soil pollution 2003 v.144 no.1/4 pp. 41-56
ISSN:
0049-6979
Subject:
Hordeum vulgare; barley; nutrient uptake; phosphorus; desorption; arsenic; adsorption; dry matter accumulation; phytotoxicity; nutrient deficiencies; soil solution; mined soils; topsoil; soil pollution; polluted soils; nutrient availability; phosphates

27. The Influence of pH, Electrolyte Type, and Surface Coating on Arsenic(V) Adsorption onto Kaolinites

Author:
Sophie Cornu; Dominique Breeze; Alain Saada; Philippe Baranger
Source:
Soil Science Society of America journal 2003 v.67 no.4 pp. 1127-1132
ISSN:
0361-5995
Subject:
adsorption; arsenic; calcium; calcium nitrate; coatings; electrolytes; humic acids; kaolinite; pH; sodium; sodium nitrate
Abstract:
... The adsorption of arsenate (As[V]) has been investigated through batch experiments using two solid phases: a purified kaolinite and a kaolinite coated with humic acid (HA). The influence of various chemical parameters on As(V) adsorption onto kaolinite are examined, namely initial As concentration, pH, electrolyte type (Ca and Na) and concentration, and the presence or absence of a HA coating on t ...
DOI:
10.2136/sssaj2003.1127

28. Soil properties affecting solid-liquid distribution of As(V) in soils

Author:
Brouwere, K. de; Smolders, E.; Merckx, R.
Source:
European journal of soil science 2004 v.55 no.1 pp. 165-173
ISSN:
1351-0754
Subject:
arsenic; isotopes; soil pollution; soil transport processes; soil solution; lead; adsorption; soil pH; desorption; mathematical models
DOI:
10.1046/j.1365-2389.2003.00584.x

29. Adsorption-desorption of arsenate in three Spanish soils

Author:
Alvarez-Benedi, J.; Bolado, S.; Cancillo, I.; Calvo, C.; Garcia-Sinovas, D.
Source:
Vadose zone journal 2005 v.4 no.2 pp. -
ISSN:
1539-1663
Subject:
arsenic; chemical speciation; adsorption; desorption; agricultural soils; sandy soils; clay soils; sorption isotherms; phosphates; nitrates; chlorides; sulfates; bioavailability; sandy clay loam soils; Spain
Abstract:
... Adsorption-desorption processes of As in agricultural soils are of great importance because of the risk of entry of this contaminant into the food chain, As(V) being the main form of As in well-aerated environments. This study presents the dynamics of the adsorption of As(V) in three agricultural soils (Xerochrept, Xerofluvent, and Xerorthent) with loamy sand, sandy clay loam, and clay textures, r ...

30. Adsorption–Desorption of Arsenate in Three Spanish Soils

Author:
J. Álvarez-Benedí; S. Bolado; I. Cancillo; C. Calvo; D. García-Sinovas
Source:
Vadose zone journal 2005 v.4 no.2 pp. 282-290
ISSN:
1539-1663
Subject:
Xerofluvents; adsorption; agricultural soils; arsenates; arsenic; bioavailability; chlorides; clay; desorption; food chain; heat production; hysteresis; ions; irrigation water; loamy sand soils; nitrates; phosphates; sandy clay loam soils; simulation models; solutes; sorption isotherms; sulfates; temperature; vadose zone
Abstract:
... Adsorption–desorption processes of As in agricultural soils are of great importance because of the risk of entry of this contaminant into the food chain, As(V) being the main form of As in well-aerated environments. This study presents the dynamics of the adsorption of As(V) in three agricultural soils (Xerochrept, Xerofluvent, and Xerorthent) with loamy sand, sandy clay loam, and clay textures, r ...
DOI:
10.2136/vzj2004.0095

31. Arsenate and Arsenite Sorption on Carbonate Hosted Precious Metals Ore

Author:
David L. Decker; Charalambos Papelis; Scott W. Tyler; Mark J. Logsdon; Jirka Šimůnek
Source:
Vadose zone journal 2006 v.5 no.1 pp. 419-429
ISSN:
1539-1663
Subject:
arsenic; chemical speciation; adsorption; carbonates; sorption isotherms; pH
Abstract:
... The societal impacts of As in water resources in the arid western USA are potentially acute as a consequence of the combined effects of limited water supplies and the pervasive occurrence of naturally occurring As in subsurface geologic formations, including the carbonate-hosted, disseminated gold-bearing formations of the Carlin Trend. The prevalence of As in secondary minerals in gold-bearing ca ...
DOI:
10.2136/vzj2005.0038

32. Arsenic Removal from Aqueous Solution by Iron Oxide-Coated Fungal Biomass: A Factorial Design Analysis

Author:
Pokhrel, D.; Viraraghavan, T.
Source:
Water, air, and soil pollution 2006 v.173 no.1-4 pp. 195-208
ISSN:
0049-6979
Subject:
water pollution; arsenic; remediation; extraction; iron oxides; Aspergillus niger; fungi; bioaccumulation; adsorbents; adsorption
DOI:
10.1007/s11270-005-9056-z

33. Arsenic uptake and accumulation in curly endives (Cichorium endivia L.) irrigated with contaminated water

Author:
Calvo, C.; Bolado, S.; Alvarez-Benedi, J.; Andrade, M.A.
Source:
Journal of environmental science and health 2006 v.41 no.4 pp. 459-470
ISSN:
0360-1234
Subject:
arsenic; arsenates; soil pollution; polluted soils; irrigation water; water pollution; Cichorium endivia; endive; uptake mechanisms; adsorption; bioaccumulation; chemical concentration; phytotoxicity; human health; food contamination
DOI:
10.1080/03601230600634778
PubMed:
16753964

34. Characterizing As(III, V) adsorption by soils surrounding ash disposal facilities

Author:
Burns, P.E.; Hyun, S.; Lee, L.S.; Murarka, I.
Source:
Chemosphere 2006 v.63 no.11 pp. 1879-1891
ISSN:
0045-6535
Subject:
coal fly ash; waste disposal; landfills; soil pollution; sulfates; landfill leachates; arsenic; calcium; pH; polluted soils; adsorption
DOI:
10.1016/j.chemosphere.2005.10.026
PubMed:
16325227

35. Fate of arsenic compounds in poultry litter upon land application

Author:
Jackson, B.P.; Seaman, J.C.; Bertsch, P.M.
Source:
Chemosphere 2006 v.65 no.11 pp. 2028-2034
ISSN:
0045-6535
Subject:
water solubility; land application; Ultisols; copper; arsenic; poultry manure; soil amendments; coastal plain soils; dissolved organic carbon; manure spreading; antibiotic residues; roxarsone; environmental fate; desorption; adsorption
DOI:
10.1016/j.chemosphere.2006.06.065
PubMed:
16899273

36. Mobilisation of arsenic from a mining soil in batch slurry experiments under bio-oxidative conditions

Author:
Bayard, R.; Chatain, V.; Gachet, C.; Troadec, A.; Gourdon, R.
Source:
Water research 2006 v.40 no.6 pp. 1240-1248
ISSN:
0043-1354
Subject:
chemical precipitation; Acidithiobacillus; iron hydroxides; sulfur; soil pollution; aerobic conditions; bioremediation; iron; oxidation; soil pH; batch systems; redox potential; soil bacteria; arsenic; leaching; adsorption; immobilization in soil; mined soils; France
DOI:
10.1016/j.watres.2006.01.025
PubMed:
16529789

37. Mobilization of Arsenite by Competitive Interaction with Silicic Acid

Author:
Todd P. Luxton; Christopher J. Tadanier; Matthew J. Eick
Source:
Soil Science Society of America journal 2006 v.70 no.1 pp. 204-214
ISSN:
0361-5995
Subject:
acute toxicity; adsorption; arsenic; arsenites; drinking water; goethite; groundwater; health effects assessments; human health; iron oxyhydroxides; ligands; maximum contaminant level; oxyanions; pH; prediction; silica; silicic acid; silicon; zeta potential
Abstract:
... Due to the acute toxicity of As, mobilization of even a small fraction of As into surface and ground waters used as a source for drinking water represents a substantial risk to human health. Here we evaluate the mobilization of arsenite [As(III)] from the Fe-(hydr)oxide mineral goethite (α-FeOOH) through competitive displacement by silicic acid, a naturally occurring and ubiquitous inorganic ligan ...
DOI:
10.2136/sssaj2005.0101

38. Using flow calorimetry to determine the molar heats of cation and anion exchange and the point of zero net charge on amorphous aluminum hydroxides

Author:
Nadine J. Kabengi; R. Dean Rhue; Samira H. Daroub
Source:
Soil science 2006 v.171 no.1 pp. 13-20
ISSN:
0038-075X
Subject:
soil colloids; arsenic; ion exchange; heat; cations; soil analysis; anions; adsorption; calorimetry; aluminum hydroxide
Abstract:
... A technique for determining the point of zero net charge (PZNC) using flow adsorption calorimetry was investigated. The rationale behind this method is that the heat of exchange, determined calorimetrically, is directly proportional to surface charge and that the PZNC can be equated to the pH at which the heats of cation exchange (CE) and anion exchange (AE) are equal. The technique was tested usi ...
DOI:
10.1097/01.ss.0000187357.47234.ce

39. Arsenic adsorption in soils: second-order and multireaction models

Author:
H. M. Selim; H. Zhang
Source:
Soil science 2007 v.172 no.6 pp. 444-458
ISSN:
0038-075X
Subject:
arsenic; adsorption; desorption; mathematical models; clay soils; loam soils; sandy soils; soil pollution; kinetics; sorption isotherms
Abstract:
... Arsenic (As) is a toxic element, and the understanding of its retention in the soil environment is a prerequisite in predicting As behavior in the vadose zone. The objective of this study was to quantify the extent of the kinetics of As adsorption in soils over a wide range of concentrations and to investigate the capabilities of multireaction and a second-order modeling (MRM and SOM, respectively ...
DOI:
10.1097/ss.0b013e31804fa2a1

40. Arsenic immobilization in soils amended with drinking-water treatment residuals

Author:
Sarkar, D.; Makris, K.C.; Vandanapu, V.; Datta, R.
Source:
Environmental pollution 2007 v.146 no.2 pp. 414-419
ISSN:
0269-7491
Subject:
arsenic; immobilization in soil; drinking water; soil amendments; adsorption; iron hydroxides; aluminum hydroxide; remediation; soil pollution; polluted soils; chemical residues; phosphates; soil chemical properties; pesticides; provenance; Florida
DOI:
10.1016/j.envpol.2006.06.035
PubMed:
16939697

41. Arsenic(V) Adsorption onto Biogenic Hydroxyapatite: Solution Composition Effects

Author:
Mariela Czerniczyniec; Silvia Farías; Jorge Magallanes; Daniel Cicerone
Source:
Water, air, and soil pollution 2007 v.180 no.1-4 pp. 75-82
ISSN:
0049-6979
Subject:
water pollution; arsenic; water treatment; hydroxyapatite; adsorption; cows; bones; salinity; pH; water hardness
Abstract:
... This study qualifies and quantifies the effects of pH, hardness, alkalinity, salinity and bone calcination temperature related with the adsorption of As(V) onto biogenic hydroxyapatite (HAPb) obtained from cow-charred bones. Arsenic contamination of surface and subsurface waters is widely extended in Argentina. It is a problem of major concern, particularly in rural and suburban areas where there ...
DOI:
10.1007/s11270-006-9251-6

42. Biosorption of arsenic (V) with acid-washed crab shells

Author:
Niu, C.H.; Volesky, B.; Cleiman, D.
Source:
Water research 2007 v.41 no.11 pp. 2473-2478
ISSN:
0043-1354
Subject:
acidity; crabs; chemical reactions; amides; mechanism of action; bioremediation; Fourier transform infrared spectroscopy; simulation models; arsenic; toxic substances; arsenates; adsorbents; chemical equilibrium; ionic strength; acid treatment; integument; adsorption; water treatment; pH
DOI:
10.1016/j.watres.2007.03.013
PubMed:
17459449

43. Enhanced Accumulation of Arsenate in Carp in the Presence of Titanium Dioxide Nanoparticles

Author:
Sun, H.; Zhang, X.; Niu, Q.; Chen, Y.; Crittenden, J.C.
Source:
Water, air, and soil pollution 2007 v.178 no.1-4 pp. 245-254
ISSN:
0049-6979
Subject:
Cyprinus carpio; toxicity testing; carp; tissue distribution; intestines; sorption isotherms; stomach; water pollution; bioaccumulation; muscles; arsenic; titanium dioxide; arsenates; pharmacokinetics; adsorption; liver; food contamination; physiological transport; particle size; gills; nanoparticles
Abstract:
... In this study adsorption of arsenic (As) onto TiO₂ nanoparticles and the facilitated transport of As into carp (Cyprinus carpio) by TiO₂ nanoparticles was examined. Adsorption kinetics and adsorption isotherm were conducted by adding As(V) to TiO₂ suspensions. Facilitated transport of As by TiO₂ nanoparticles was assessed by accumulation tests exposing carp to As(V) contaminated water in the prese ...
DOI:
10.1007/s11270-006-9194-y

44. Enhancement of As(V) adsorption onto activated sludge by methylation treatment

Author:
Kang, So-Young; Kim, Dong-Wook; Kim, Kyoung-Woong
Source:
Environmental geochemistry and health 2007 v.29 no.4 pp. 313-318
ISSN:
0269-4042
Subject:
activated sludge; adsorption; arsenates; arsenic; batch systems; binding sites; biosorption; effluents; ions; methylation; neutralization; pH
Abstract:
... Biosorption properties of arsenate [As(V)] onto activated sludge were investigated in batch systems. The adsorption of As(V) onto sludge increased from 23 to 266 μg/g dry weight through the methylation of the activated sludge. This increase resulted from neutralization of carboxylic groups via the methylation process. The pH effect of As(V) uptake was also investigated and As(V) adsorption by meth ...
DOI:
10.1007/s10653-007-9096-y
PubMed:
17505894

45. Fluxes of inorganic and organic arsenic species in a Norway spruce forest floor

Author:
Huang, J.H.; Matzner, E.
Source:
Environmental pollution 2007 v.149 no.2 pp. 201-208
ISSN:
0269-7491
Subject:
forest litter; arsenic; forest soils; soil pollution; forested watersheds; upland soils; montane forests; biogeochemistry; throughfall; cacodylic acid; Picea abies; mineral soils; arsenites; arsenates; adsorption; desorption; growing season; dormancy; microbial activity; infiltration (hydrology); Germany
DOI:
10.1016/j.envpol.2007.01.004
PubMed:
17624646

46. Release of elements to natural water from sediments of Lake Roosevelt, Washington, USA

Author:
Paulson, A.J.; Cox, S.E.
Source:
Environmental toxicology and chemistry 2007 v.26 no.12 pp. 2550-2559
ISSN:
0730-7268
Subject:
water pollution; carbonates; sediment contamination; lakes; copper; zinc; lead; heavy metals; slurries; arsenic; geochemistry; cadmium; water hardness; industrial wastes; adsorption; toxicity; metallurgy; British Columbia
DOI:
10.1897/07-052.1
PubMed:
18020685

47. Removal of contaminants in leachate from landfill by waste steel scrap and converter slag

Author:
Oh, Byung-Taek; Lee, Jai-Young; Yoon, Jeyong
Source:
Environmental geochemistry and health 2007 v.29 no.4 pp. 331-336
ISSN:
0269-4042
Subject:
adsorption; ammonium compounds; arsenic; cadmium; chlorides; chromium; copper; dehalogenation; heavy metals; industrial wastes; ions; iron oxides; landfills; lead; manganese; nitrates; recycling; slags; steel; tetrachloroethylene; zinc
Abstract:
... This study may be the first investigation to be performed into the potential benefits of recycling industrial waste in controlling contaminants in leachate. Batch reactors were used to evaluate the efficacy of waste steel scrap and converter slag to treat mixed contaminants using mimic leachate solution. The waste steel scrap was prepared through pre-treatment by an acid-washed step, which retaine ...
DOI:
10.1007/s10653-007-9094-0
PubMed:
17492478

48. The mechanisms of arsenic removal from soil by electrokinetic process coupled with iron permeable reaction barrier

Author:
Yuan, C.; Chiang, T.S.
Source:
Chemosphere 2007 v.67 no.8 pp. 1533-1542
ISSN:
0045-6535
Subject:
arsenic; soil pollution; remediation; soil treatment; electrical treatment; iron; adsorption; chemical precipitation
DOI:
10.1016/j.chemosphere.2006.12.008
PubMed:
17267020

49. Adsorption Sequence of Toxic Inorganic Anions on a Soil

Author:
Saeki, Kazutoshi
Source:
Bulletin of environmental contamination and toxicology 2008 v.81 no.5 pp. 508-512
ISSN:
0007-4861
Subject:
adsorption; anions; arsenic; chromium; molybdenum; pH; protons; selenium; soil; toxicity
Abstract:
... The adsorption of six anions (arsenate(As(V)), chromate(Cr(VI)), fluoride(F(-I)), molybdate(Mo(VI)), selenate(Se(VI)), and selenite(Se(IV))) on an andosol and the concomitant H⁺ consumptions together with the sorption were investigated to understand the behaviors of toxic inorganic anions in environment. Based on the estimated adsorption maximum by the simple Langmuir equation, the order of adsorp ...
DOI:
10.1007/s00128-008-9505-7
PubMed:
18663398

50. Adsorption and transport of arsenate in carbonate-rich soils: Coupled effects of nonlinear and rate-limited sorption

Author:
Yolcubal, Irfan; Akyol, Nihat Hakan
Source:
Chemosphere 2008 v.73 no.8 pp. 1300-1307
ISSN:
0045-6535
Subject:
arsenic; calcareous soils; models; extraction; adsorption; soil transport processes; carbonates; alkalinity; sorption isotherms; chemical concentration; Turkey (country)
DOI:
10.1016/j.chemosphere.2008.07.013
PubMed:
18718636

51. Arsenic bioavailability in the soil amended with leaves of arsenic hyperaccumulator, Chinese brake fern (Pteris vittata L)

Author:
Du, X.; Cui, Y.; Weng, L.; Cao, Q.; Zhu, Y.
Source:
Environmental toxicology and chemistry 2008 v.27 no.1 pp. 126-130
ISSN:
0730-7268
Subject:
arsenic; soil pollution; bioavailability; Pteris vittata; ferns and fern allies; leaves; soil amendments; hyperaccumulators; wheat; germination; Triticum aestivum; shoots; roots; bioaccumulation; duration; extraction; adsorption; linear models; risk assessment; phytoremediation; bioassays; uptake mechanisms; soil-plant interactions; plant litter; biodegradation; provenance; China
Abstract:
... An incubation experiment was carried out to better understand the fate of As during the decomposition of As-rich Chinese brake fern (Pteris vittata L.) leaves and to assess As bioavailability in soil. Dried fern leaves with an As concentration of 1,150 +/- 14 microgram/g were amended with unpolluted soil at 1 and 3%. After aging for one, three, and six months, germinated wheat was planted in the s ...
DOI:
10.1897/06-635.1
PubMed:
18092848

52. Arsenic in groundwaters in the Northern Appalachian Mountain belt: A review of patterns and processes

Author:
Stephen C. Peters
Source:
Journal of contaminant hydrology 2008 v.99 no.1-4 pp. 8-21
ISSN:
0169-7722
Subject:
iron oxides; anthropogenic activities; groundwater; iron; pollution; surface water; wells; basins; nitrate reduction; arsenic; bedrock; pyrites; drinking water; adsorption; households; landfills; pH; Maine; Appalachian region; New England region
Abstract:
... Naturally occurring arsenic in the bedrock of the Northern Appalachian Mountain belt was first recognized in the late 19th century. The knowledge of the behavior of arsenic in groundwater in this region has lagged behind nearly a century, with the popular press reporting on local studies in the early 1980s, and most peer-reviewed research articles on regional patterns conducted and written in the ...
DOI:
10.1016/j.jconhyd.2008.04.001
PubMed:
18571283

53. Arsenic re-mobilization in water treatment adsorbents under reducing conditions: Part II. XAS and modeling study

Author:
Liu, Suqin; Jing, Chuanyong; Meng, Xiaoguang
Source:
Science of the total environment 2008 v.392 no.1 pp. 137-144
ISSN:
0048-9697
Subject:
simulation models; arsenic; leaching; water treatment; adsorbents; drinking water; spectroscopy; desorption; adsorption
Abstract:
... The mechanism of arsenic re-mobilization in spent adsorbents under reducing conditions was studied using X-ray absorption spectroscopy and surface complexation model calculations. X-ray absorption near edge structure (XANES) spectroscopy demonstrated that As(V) was partially reduced to As(III) in spent granular ferric hydroxide (GFH), titanium dioxide (TiO₂), activated alumina (AA) and modified ac ...
DOI:
10.1016/j.scitotenv.2007.10.033

54. Arsenic removal in an iron oxide-coated fungal biomass column: Analysis of breakthrough curves

Author:
Pokhrel, D.; Viraraghavan, T.
Source:
Bioresource technology 2008 v.99 no.6 pp. 2067-2071
ISSN:
0960-8524
Subject:
Aspergillus niger; adsorption; aqueous solutions; arsenic; biomass; fungi; models
Abstract:
... Column studies were conducted, using iron oxide-coated Aspergillus niger biomass, to examine the removal of arsenic [As(III) and As(V)] from an aqueous solution. The Thomas and Yan models were examined to predict the breakthrough curves. The Yan Model described the data better (based on the R ² values) when compared with the Thomas Model. The adsorption capacity of the iron oxide-coated biomass es ...
DOI:
10.1016/j.biortech.2007.04.023
PubMed:
17560780

55. Arsenite sorption in liquid-phase by Aspergillus fumigatus: adsorption rates and isotherm studies

Author:
Sathishkumar, Muthuswamy; Binupriya, Arthur Raj; Swaminathan, Krishnaswamy; Choi, Jong-Gyeong; Yun, Sei-Eok
Source:
World journal of microbiology & biotechnology 2008 v.24 no.9 pp. 1813-1822
ISSN:
0959-3993
Subject:
Aspergillus fumigatus; adsorption; agitation; arsenic; arsenites; biomass; biosorption; desorption; models; pH; sodium hydroxide
Abstract:
... The live and pretreated biomass of Aspergillus fumigatus was used for the biosorption of As(III) from aqueous solution. Three parameters that affect the As(III) adsorption, namely agitation time, concentration of As(III), and pH have been investigated. In order to develop an effective and accurate design model for removal of As(III), adsorption kinetics and equilibrium data are essential basic req ...
DOI:
10.1007/s11274-008-9675-9

56. Bio-Separation of Toxic Arsenate Ions from Dilute Solutions by Native and Pretreated Biomass of Aspergillus fumigatus in Batch and Column Mode: Effect of Biomass Pretreatment

Author:
Sathishkumar, M.; Binupriya, A. R.; Swaminathan, K.; Choi, J. G.; Yun, S. E.
Source:
Bulletin of environmental contamination and toxicology 2008 v.81 no.3 pp. 316-322
ISSN:
0007-4861
Subject:
Aspergillus fumigatus; adsorption; arsenic; biomass; desorption; ions; models; pH; sodium hydroxide; sorption isotherms; toxicity
Abstract:
... The sorption of As(V) from aqueous solution onto live and pretreated biomass of Aspergillus fumigatus was studied. The studies on optimization of contact time, adsorbent dosage and pH showed that the FeCl₃ treated and FeSO₄ treated biomass had the maximum capacity to adsorb As(V) while acid treated biomass was found to be minimum. Adsorption parameters were determined using both Langmuir and Freun ...
DOI:
10.1007/s00128-008-9496-4

57. Bioremoval of arsenic species from contaminated waters by sulphate-reducing bacteria

Author:
Teclu, Daniel; Tivchev, George; Laing, Mark; Wallis, Mike
Source:
Water research 2008 v.42 no.19 pp. 4885-4893
ISSN:
0043-1354
Subject:
arsenic; sulfate-reducing bacteria; water treatment; microbial growth; bioreactors; adsorption; pH; biomass; sorption isotherms; arsenates; arsenites; sulfides; groundwater contamination
DOI:
10.1016/j.watres.2008.09.010
PubMed:
18929386

58. Characteristics of molybdate-impregnated chitosan beads (MICB) in terms of arsenic removal from water and the application of a MICB-packed column to remove arsenic from wastewater

Author:
Chen, Chih-Yu; Chang, Tsu-Hua; Kuo, Jong-Tar; Chen, Yu-Feng; Chung, Ying-Chien
Source:
Bioresource technology 2008 v.99 no.16 pp. 7487-7494
ISSN:
0960-8524
Subject:
adsorption; arsenic; chitosan; desorption; ions; molybdates; pH; temperature; wastewater; wastewater treatment; water purification
Abstract:
... The removal of arsenic (As) species, such as As(III) and As(V), from water by molybdate-impregnated chitosan beads (MICB) in both batch and continuous operations was studied. The effects of pH, temperature, coexisting ions, and arsenic concentrations were studied in batch tests. Studies on the kinetic adsorption of MICB, the recovery of arsenic by the desorption solution, and the reuse of MICB wer ...
DOI:
10.1016/j.biortech.2008.02.015
PubMed:
18359225

59. Chemically modified maize cobs waste with enhanced adsorption properties upon methyl orange and arsenic

Author:
Elizalde-González, María P.; Mattusch, J.; Wennrich, R.
Source:
Bioresource technology 2008 v.99 no.11 pp. 5134-5139
ISSN:
0960-8524
Subject:
adsorption; amines; ammonia; arsenates; arsenic; corn; corn cobs; phosphoric acid; phosphorylation; urea; wastes
Abstract:
... The surface chemistry of maize naturasorbent was altered in this work by the modifying agents: phosphoric acid and different amines (triethanolamine, diethylenetriamine and 1,4-diaminobutane). Removal of methyl orange (25mgl⁻¹) was <50% by maize corn cobs modified by phosphorylation and higher by the quaternized samples: 68% with the 1,4-diaminobutane and 73% with the diethylenetriamine modificato ...
DOI:
10.1016/j.biortech.2007.09.023

60. Competitive sorption-desorption kinetics of arsenate and phosphate in soils

Author:
Hua Zhang; H. Magdi Selim
Source:
Soil science 2008 v.173 no.1 pp. 3-12
ISSN:
0038-075X
Subject:
arsenic; phosphorus; chemical speciation; anions; adsorption; desorption; kinetics; sorption isotherms; soil chemistry; loamy sand soils
Abstract:
... The competition between arsenate (AsO4) and phosphate (PO4) on mineral surfaces has the potential of increasing arsenic mobility and bioavailability in the soil and water environment. In this study, kinetics of competitive sorption of AsO4 and PO4 in three soils was investigated in batch systems by simultaneously introducing the ligands at different molar ratios. Adsorption was carried out at diff ...
DOI:
10.1097/ss.0b013e31815ce750

61. Development of a scalable model for predicting arsenic transport coupled with oxidation and adsorption reactions

Author:
Radu, Tanja; Kumar, Anjani; Clement, T. Prabhakar; Jeppu, Gautham; Barnett, Mark O
Source:
Journal of contaminant hydrology 2008 v.95 no.1-2 pp. 30-41
ISSN:
0169-7722
Subject:
arsenic; groundwater contamination; adsorption; manganese oxides; sorption isotherms; reaction kinetics; oxidation; mathematical models; equations; groundwater flow
Abstract:
... Understanding the fundamentals of arsenic adsorption and oxidation reactions is critical for predicting its transport dynamics in groundwater systems. We completed batch experiments to study the interactions of arsenic with a common MnO₂(s) mineral, pyrolusite. The reaction kinetics and adsorption isotherm developed from the batch experiments were integrated into a scalable reactive transport mode ...
DOI:
10.1016/j.jconhyd.2007.07.004

62. Effect of NOM on arsenic adsorption by TiO2 in simulated As(III)-contaminated raw waters

Author:
Liu, G.; Zhang, X.; Talley, J.W.; Neal, C.R.; Wang, H.
Source:
Water research 2008 v.42 no.8-9 pp. 2309-2319
ISSN:
0043-1354
Subject:
groundwater; groundwater contamination; arsenic; titanium dioxide; water treatment; adsorption; adsorbents; organic matter; anaerobic conditions; light; pH; arsenates; filtrates; equations; mathematical models; sorption isotherms
DOI:
10.1016/j.watres.2007.12.023
PubMed:
18316108

63. Effect of in situ soil amendments on arsenic uptake in successive harvests of ryegrass (Lolium perenne cv Elka) grown in amended As-polluted soils

Author:
Hartley, William; Lepp, Nicholas W.
Source:
Environmental pollution 2008 v.156 no.3 pp. 1030-1040
ISSN:
0269-7491
Subject:
Lolium perenne; soil amendments; arsenic; polluted soils; phytoremediation; uptake mechanisms; iron; adsorption; adsorbents; anions; liming materials; goethite; copper; zinc; nickel; fractionation; dry matter accumulation; bioavailability
DOI:
10.1016/j.envpol.2008.04.024

64. Effects of different forms of nitrogen fertilizers on arsenic uptake by rice plants

Author:
Chen, X.P.; Zhu, Y.G.; Hong, M.N.; Kappler, A.; Xu, Y.X.
Source:
Environmental toxicology and chemistry 2008 v.27 no.4 pp. 881-887
ISSN:
0730-7268
Subject:
ammonia; rice; Oryza sativa; roots; rhizosphere; soil pollution; soil solution; soil microorganisms; population density; oxidation; uptake mechanisms; paddy soils; groundwater contamination; arsenic; minerals; provenance; adsorption; nitrogen fertilizers; coprecipitation; nitrates; China
DOI:
10.1897/07-368.1
PubMed:
18333689

65. Experimental and modelling analysis of As(V) ions adsorption on granular activated carbon

Author:
Di Natale, F.; Erto, A.; Lancia, A.; Musmarra, D.
Source:
Water research 2008 v.42 no.8-9 pp. 2007-2016
ISSN:
0043-1354
Subject:
chemical concentration; activated carbon; simulation models; salinity; arsenic; water treatment; water temperature; adsorbents; pH; sorption isotherms; anions; adsorption
DOI:
10.1016/j.watres.2007.12.008

66. Geochemical characterisation of shallow aquifer sediments of Matlab Upazila, Southeastern Bangladesh — Implications for targeting low-As aquifers

Author:
Mattias von Brömssen; Sara Häller Larsson; Prosun Bhattacharya; M. Aziz Hasan; Kazi Matin Ahmed; M. Jakariya; Mohiuddin A. Sikder; Ondra Sracek; Annelie Bivén; Barbora Doušová; Claudio Patriarca; Roger Thunvik; Gunnar Jacks
Source:
Journal of contaminant hydrology 2008 v.99 no.1-4 pp. 137-149
ISSN:
0169-7722
Subject:
adsorption; aquifers; arsenic; color; geochemistry; groundwater; models; oxides; risk reduction; sediments; wells; Bangladesh
Abstract:
... High arsenic (As) concentrations in groundwater pose a serious threat to the health of millions of people in Bangladesh. Reductive dissolution of Fe(III)-oxyhydroxides and release of its adsorbed As is considered to be the principal mechanism responsible for mobilisation of As. The distribution of As is extremely heterogeneous both laterally and vertically. Groundwater abstracted from oxidised red ...
DOI:
10.1016/j.jconhyd.2008.05.005
PubMed:
18619706

67. Kinetic and thermodynamic aspects of adsorption of arsenic onto granular ferric hydroxide (GFH)

Author:
Banerjee, K.; Amy, G.L.; Prevost, M.; Nour, S.; Jekel, M.; Gallagher, P.M.; Blumenschein, C.D.
Source:
Water research 2008 v.42 no.13 pp. 3371-3378
ISSN:
0043-1354
Subject:
water pollution; arsenic; water treatment; water temperature; adsorption; reaction kinetics; ferric hydroxide; adsorbents; sorption isotherms; chemical speciation; pH; hydrochemistry; thermodynamics
DOI:
10.1016/j.watres.2008.04.019
PubMed:
18538818

68. Mobility of adsorbed arsenic in two calcareous soils as influenced by water extract of compost

Author:
Lin, H.T.; Wang, M.C.; Seshaiah, K.
Source:
Chemosphere 2008 v.71 no.4 pp. 742-749
ISSN:
0045-6535
Subject:
extracts; soil pollution; composts; arsenic; organic compounds; infiltration (hydrology); leaching; calcareous soils; adsorption
DOI:
10.1016/j.chemosphere.2007.10.022
PubMed:
18035393

69. Particle-facilitated lead and arsenic transport in abandoned mine sites soil influenced by simulated acid rain

Author:
Hu, S.; Chen, X.; Shi, J.; Chen, Y.; Lin, Q.
Source:
Chemosphere 2008 v.71 no.11 pp. 2091-2097
ISSN:
0045-6535
Subject:
mine spoil; leaching; lead; arsenic; adsorption; particulates; silicates; infiltration (hydrology); acid deposition
DOI:
10.1016/j.chemosphere.2008.01.024
PubMed:
18329689

70. Removal of arsenic (III) and arsenic (V) from aqueous medium using chitosan-coated biosorbent

Author:
Boddu, V.M.; Abburi, K.; Talbott, J.L.; Smith, E.D.; Haasch, R.
Source:
Water research 2008 v.42 no.3 pp. 633-642
ISSN:
0043-1354
Subject:
arsenic; chitosan; adsorption; water treatment; pH; sodium hydroxide; sorption isotherms
DOI:
10.1016/j.watres.2007.08.014
PubMed:
17822735

71. The comparison of arsenite and arsinate adsorption on an andosol

Author:
Kazutoshi Saeki
Source:
Soil science 2008 v.173 no.4 pp. 248-256
ISSN:
0038-075X
Subject:
allophanic soils; arsenic; chemical speciation; adsorption; desorption; soil pH
Abstract:
... The adsorption of arsenate [As(V)] and arsenite [As(III)] by an allophanic andosol was investigated with respect to the isotherms at pH 5.0, the effects of pH, and desorption using other anions. SOILCHEM estimated that almost all of the As(V) and As(III) existed as HAsO4 and HAsO2, even in the concentration range from 0.0001 to 0.1 mol L (M) for the 0.01 M sodium perchlorate background solution at ...
DOI:
10.1097/SS.0b013e31816d1f2b

72. The impact of sequestration on the bioaccessibility of arsenic in long-term contaminated soils

Author:
Smith, E.; Naidu, R.; Weber, J.; Juhasz, A.L.
Source:
Chemosphere 2008 v.71 no.4 pp. 773-780
ISSN:
0045-6535
Subject:
arsenic; soil pollution; polluted soils; bioavailability; adsorption; chemical speciation; iron oxides; iron hydroxides; aluminum oxide; aluminum hydroxide; fractionation
DOI:
10.1016/j.chemosphere.2007.10.012
PubMed:
18023842

73. The removal of As(III) and As(V) from aqueous solutions by waste materials

Author:
Rahaman, M.S.; Basu, A.; Islam, M.R.
Source:
Bioresource technology 2008 v.99 no.8 pp. 2815-2823
ISSN:
0960-8524
Subject:
Gadus morhua; adsorption; aqueous solutions; arsenic; charcoal; chickens; coconuts; cod (fish); lipids; models; pH; streams
Abstract:
... The use of different waste materials such as Atlantic Cod fish scale, chicken fat, coconut fibre and charcoal in removing arsenic [As(III) and As(V)] from aqueous solutions was investigated. Initial experimental runs, conducted for both As(III) and As(V) with the aforementioned materials, demonstrated the potential of using Atlantic Cod fish scale in removing both species of arsenic from aqueous s ...
DOI:
10.1016/j.biortech.2007.06.038
PubMed:
17697772

74. A pristine environment and water quality in perspective: Maliau Basin, Borneo's mysterious world

Author:
Mokhtar, Mazlin Bin; Aris, Ahmad Zaharin; Abdullah, Mohd Harun; Yusoff, Mohd Kamil; Abdullah, Md. Pauzi; Idris, Abd. Rahim; Raja Uzir, Raja Ibrahim
Source:
Water and environment journal 2009 v.23 no.3 pp. 219-228
ISSN:
1747-6585
Subject:
Eucalyptus; adsorption; aluminum; arsenic; barium; basins; cadmium; calcium; chromium; cobalt; copper; dissolved oxygen; drinking; electrical conductivity; freshwater; iron; irrigation; lead; magnesium; manganese; nickel; pH; potassium; river water; rivers; salinity; selenium; silver; sodium; strontium; surface water; temperature; total dissolved solids; turbidity; water quality; zinc; Borneo
Abstract:
... The chemical characteristics of the surface water of Eucalyptus River, in Maliau Basin, were studied based on its major ion chemistry and its suitability for drinking, domestic use and irrigation. Water samples from the river were collected and analysed for pH, temperature, dissolved oxygen (DO), electrical conductivity (EC), total dissolved solids (TDS), turbidity, Cl, SO₄, Ca, Mg, Na and K. Besi ...
DOI:
10.1111/j.1747-6593.2008.00139.x

75. Adsorption of arsenic (V) by iron (III)-modified natural zeolitic tuff

Author:
Tanja Stanić; Aleksandra Daković; Aleksandar Živanović; Magdalena Tomašević-Čanović; Vera Dondur; Sonja Milićević
Source:
Environmental chemistry letters 2009 v.7 no.2 pp. 161-166
ISSN:
1610-3653
Subject:
adsorption; arsenic; correlation; iron; models; tuff
Abstract:
... Adsorption of arsenic (V) by natural zeolitic tuff, modified with iron (III), was investigated. Also, the iron (III) adsorption characteristics by natural zeolitic tuff was evaluated. It was determined that iron (III) adsorption by starting zeolitic tuff was best represented by the Freundlich type of isotherm, having correlation coefficient (r ²) of 0.990. Arsenic (V) adsorption by iron (III)-modi ...
DOI:
10.1007/s10311-008-0152-3

76. Adsorption of arsenic to magnetite nanoparticles: Effect of particle concentration, pH, ionic strength, and temperature

Author:
Shipley, Heather J.; Yean, Sujin; Kan, Amy T.; Tomson, Mason B.
Source:
Environmental toxicology and chemistry 2009 v.28 no.3 pp. 509-515
ISSN:
0730-7268
Subject:
arsenic; adsorption; magnetite; particles; nanotechnology; environmental factors; pH; ionic strength; temperature; kinetics; groundwater; tap water; water pollution
Abstract:
... Little work has been conducted on the adsorption of arsenic to the mixed iron [Fe(II)/(III)] oxide magnetite and the effect that environmental parameters, such as pH, ionic strength, and temperature, have on adsorption. Magnetite nanoparticles are unique because of their affinity for both arsenate and arsenite and increased adsorption capacity from their bulk counterparts. This article shows the e ...
DOI:
10.1897/08-155.1
PubMed:
18939890

77. Arsenic (V) removal from aqueous system using adsorbent developed from a high iron-containing fly ash

Author:
Li, Yi; Zhang, Fu-Shen; Xiu, Fu-Rong
Source:
Science of the total environment 2009 v.407 no.21 pp. 5780-5786
ISSN:
0048-9697
Subject:
wastewater treatment; pollutants; arsenic; adsorption; adsorbents; fly ash; iron; oxide, hydroxide, and oxyhydroxide minerals; surface area; sorption isotherms; mathematical models
Abstract:
... A novel adsorbent for arsenic (V) removal from wastewater was developed through simple chemical processes using a special iron-abundant fly ash. In the synthesis process, the inherent iron in the fly ash was rearranged and loaded on the surface of the fly ash by dissolution and precipitation processes. The adsorbent (HIOFAA) was characterized by XRD, FT-IR, SEM, LPS and BET surface area. The resul ...
DOI:
10.1016/j.scitotenv.2009.07.017
PubMed:
19651428

78. Arsenic mobility and stabilization in topsoils

Author:
Tyrovola, Konstantina; Nikolaidis, Nikolaos P.
Source:
Water research 2009 v.43 no.6 pp. 1589-1596
ISSN:
0043-1354
Subject:
arsenic; topsoil; agricultural soils; irrigation water; simulation models; prediction; losses from soil; iron; soil pH; desorption; arsenates; adsorption; temperature; Greece
DOI:
10.1016/j.watres.2009.01.001
PubMed:
19201440

79. Broiler-Litter Application History and Soil-Depth Effects on Arsenic Sorption

Author:
Michelle McDonald; Kristofor R. Brye; David M. Miller; Edward E. Gbur
Source:
Soil science 2009 v.174 no.12 pp. 661-675
ISSN:
0038-075X
Subject:
soil organic matter; arsenic; soil amendments; poultry manure; soil depth; sorption isotherms; application rate; adsorption; Arkansas
Abstract:
... The Ozark Highlands, particularly northwest Arkansas, is one of several regions in the United States with concentrated broiler (Gallus gallus domesticus) production. Broiler litter contains N and P; thus, litter is typically land applied to surrounding pastures as a means of recycling the litter as an organic fertilizer. However, broiler litter also contains numerous heavy metals, namely arsenic ( ...
DOI:
10.1097/SS.0b013e3181c5e4fb

80. Chemistry of inorganic arsenic in soils: kinetics of arsenic adsorption-desorption

Author:
Smith, E.; Naidu, R.
Source:
Environmental geochemistry and health 2009 v.31 no.1 pp. 49-59
ISSN:
0269-4042
Subject:
adsorption; arsenic; calcium nitrate; ionic strength; sodium nitrate; soil
Abstract:
... The influence of ionic strength, index cations and competing anions on arsenate (AsV) adsorption-desorption kinetics was studied in an Alfisol soil. A flow-through reactor system similar to that developed by Carski and Sparks (Soil Sci Soc Am J 49:1114-1116, 1985) was constructed for the experiments. Arsenate adsorption kinetics for all the treatments were initially fast with 58-91% of AsV adsorbe ...
DOI:
10.1007/s10653-008-9228-z
PubMed:
19101807

81. Effect of Low Concentrations of Phosphate Ions on Extraction of Arsenic from Naturally Contaminated Soil

Author:
Mihaljevič, Martin; Ettler, Vojtěch; Sisr, Luděk; Šebek, Ondřej; Strnad, Ladislav; Vonásková, Věra
Source:
Bulletin of environmental contamination and toxicology 2009 v.83 no.3 pp. 422-427
ISSN:
0007-4861
Subject:
adsorption; arsenic; desorption; ions; lead; nickel; polluted soils
Abstract:
... The effect of low concentrations of phosphate ions on the extraction of arsenic (As) was tested on naturally contaminated soil (As 126 mg/kg) using batch experiments. Interaction entails the extraction of low concentrations of As (5.4-23.3 μg/L As). There are statistical differences in the contents of As, Ca, Cu, Ni, Pb and nitrate in the composition of the extracts. Three types of kinetic curves ...
DOI:
10.1007/s00128-009-9706-8
PubMed:
19290445

82. Effects of hardness and alkalinity on the removal of arsenic(V) from humic acid-deficient and humic acid-rich groundwater by zero-valent iron

Author:
Mak, Mark S.H.; Rao, Pinhua; Lo, Irene M.C.
Source:
Water research 2009 v.43 no.17 pp. 4296-4304
ISSN:
0043-1354
Subject:
water hardness; alkalinity; groundwater; arsenic; groundwater contamination; iron; humic acids; adsorption; chemical precipitation; calcium; bicarbonates
DOI:
10.1016/j.watres.2009.06.022
PubMed:
19580986

83. Effects of humic acid on arsenic(V) removal by zero-valent iron from groundwater with special references to corrosion products analyses

Author:
Rao, Pinhua; Mak, Mark S.H.; Liu, Tongzhou; Lai, Keith C.K.; Lo, Irene M.C.
Source:
Chemosphere 2009 v.75 no.2 pp. 156-162
ISSN:
0045-6535
Subject:
groundwater contamination; aquifers; arsenic; chemical speciation; remediation; iron; adsorption; chemical precipitation; humic acids
DOI:
10.1016/j.chemosphere.2008.12.019
PubMed:
19157491

84. Extraction of arsenic species in soils using microwave-assisted extraction detected by ion chromatography coupled to inductively coupled plasma mass spectrometry

Author:
Rahman, Mohammad Mahmudur; Chen, ZuLiang; Naidu, Ravi
Source:
Environmental geochemistry and health 2009 v.31 no.1 pp. 93-102
ISSN:
0269-4042
Subject:
adsorption; aluminum; arsenic; edaphic factors; hydrogen; ion exchange chromatography; iron; manganese; mass spectrometry; pH; soil; soil sampling; Bangladesh; Montana
Abstract:
... We have developed a novel microwave-assisted extraction method for determining the arsenic (As) speciation in soils that is based on extraction with phosphate solutions, including orthophosphoric acid, ammonium dihydrogen orthophosphate, and ammonium hydrogen orthophosphate. The highest extracting efficiency was obtained with 1 M ortho-phosphoric acid solution as the extractant, and this efficienc ...
DOI:
10.1007/s10653-008-9227-0
PubMed:
19085062

85. Influence of titanium dioxide nanoparticles on speciation and bioavailability of arsenite

Author:
Sun, Hongwen; Zhang, Xuezhi; Zhang, Zhiyan; Chen, Yongsheng; Crittenden, John C.
Source:
Environmental pollution 2009 v.157 no.4 pp. 1165-1170
ISSN:
0269-7491
Subject:
pollutants; titanium dioxide; nanotechnology; Cyprinus carpio; carp; animal models; arsenic; bioaccumulation; adsorption; chemical speciation
Abstract:
... In this study, the influence of the co-existence of TiO2 nanoparticles on the speciation of arsenite [As(III)] was studied by observing its adsorption and valence changing. Moreover, the influence of TiO2 nanoparticles on the bioavailability of As(III) was examined by bioaccumulation test using carp (Cyprinus carpio). The results showed that TiO2 nanoparticles have a significant adsorption capacit ...
DOI:
10.1016/j.envpol.2008.08.022
PubMed:
18976844

86. Mobility of arsenic in the sub-surface environment: An integrated hydrogeochemical study and sorption model of the sandy aquifer materials

Author:
Nath, Bibhash; Chakraborty, Sudipta; Burnol, André; Stüben, Doris; Chatterjee, Debashis; Charlet, Laurent
Source:
Journal of hydrology 2009 v.364 no.3-4 pp. 236-248
ISSN:
0022-1694
Subject:
manganese; carbonates; redox potential; geochemistry; groundwater contamination; calcium; arsenic; iron; groundwater flow; microorganisms; magnesium; aquifers; chemical speciation; cell respiration; sand; desorption; adsorption; India
Abstract:
... Groundwater and aquifer materials have been characterized geochemically at a field site located in the Chakdaha municipality of West Bengal, India. Sorption experiments were also carried out on a sandy aquifer material to understand the mobility of arsenic (As) in the sub-surface environments. The result shows that the areas associated with high groundwater As (mean: 1.8μM) is typically associated ...
DOI:
10.1016/j.jhydrol.2008.10.025

87. Natural attenuation processes in two water reservoirs receiving acid mine drainage

Author:
Sarmiento, Aguasanta M.; Olías, Manuel; Nieto, José Miguel; Cánovas, Carlos R.; Delgado, Joquín
Source:
Science of the total environment 2009 v.407 no.6 pp. 2051-2062
ISSN:
0048-9697
Subject:
acid mine drainage; adsorption; aluminum; arsenic; cadmium; chromium; cobalt; copper; coprecipitation; iron; lakes; lead; manganese; nickel; oxidation; pH; sediments; sulfides; sulfur; summer; temperature profiles; toxic substances; toxicity; water reservoirs; winter; zinc
Abstract:
... Characteristics of water profiles and sulphide formation processes in sediments were studied in two water reservoirs affected by acid mine drainage in order to investigate the mechanisms controlling the physical and chemical processes that, under favourable conditions, act to reduce the toxicity, mobility and concentration of metals and metalloids in the water column. Water columns and pore-waters ...
DOI:
10.1016/j.scitotenv.2008.11.011
PubMed:
19073338

88. Off-line coupled electrocatalytic oxidation and liquid phase polymer based retention (EO-LPR) techniques to remove arsenic from aqueous solutions

Author:
Rivas, Bernabé L.; Aguirre, María del Carmen; Pereira, Eduardo; Bucher, Christophe; Royal, Guy; Limosin, Danielle; Saint Aman, Eric; Moutet, Jean-Claude
Source:
Water research 2009 v.43 no.2 pp. 515-521
ISSN:
0043-1354
Subject:
water treatment; arsenic; water pollution; aqueous solutions; electrochemistry; oxidation; adsorption; electrolytes; catalysts; pH; ammonia
DOI:
10.1016/j.watres.2008.10.029

89. Preparation and evaluation of iron-chitosan composites for removal of As(III) and As(V) from arsenic contaminated real life groundwater

Author:
Gupta, Anjali; Chauhan, Vivek Singh; Sankararamakrishnan, Nalini
Source:
Water research 2009 v.43 no.15 pp. 3862-3870
ISSN:
0043-1354
Subject:
arsenic; groundwater contamination; water treatment; chitosan; iron; pH; adsorption; simulation models; granules; adsorbents; sorption isotherms; India
DOI:
10.1016/j.watres.2009.05.040
PubMed:
19577786

90. Remediation of organic and inorganic arsenic contaminated groundwater using a nanocrystalline TiO2-based adsorbent

Author:
Jing, Chuanyong; Meng, Xiaoguang; Calvache, Edwin; Jiang, Guibin
Source:
Environmental pollution 2009 v.157 no.8-9 pp. 2514-2519
ISSN:
0269-7491
Subject:
arsenic; groundwater contamination; remediation; titanium dioxide; adsorbents; adsorption; filtration
Abstract:
... A nanocrystalline TiO₂-based adsorbent was evaluated for the simultaneous removal of As(V), As(III), monomethylarsonic acid (MMA), and dimethylarsinic acid (DMA) in contaminated groundwater. Batch experimental results show that As adsorption followed pseudo-second order rate kinetics. The competitive adsorption was described with the charge distribution multi-site surface complexation model (CD-MU ...
DOI:
10.1016/j.envpol.2009.03.011
PubMed:
19339086

91. Removal of arsenic from water: Effect of calcium ions on As(III) removal in the KMnO4–Fe(II) process

Author:
Guan, Xiaohong; Ma, Jun; Dong, Haoran; Jiang, Li
Source:
Water research 2009 v.43 no.20 pp. 5119-5128
ISSN:
0043-1354
Subject:
water pollution; calcium; arsenic; iron; water treatment; potassium permanganate; adsorption
DOI:
10.1016/j.watres.2008.12.054
PubMed:
19201439

92. Removal of arsenic from water: Effects of competing anions on As(III) removal in KMnO4-Fe(II) process

Author:
Guan, Xiaohong; Dong, Haoran; Ma, Jun; Jiang, LI
Source:
Water research 2009 v.43 no.15 pp. 3891-3899
ISSN:
0043-1354
Subject:
arsenic; water treatment; anions; iron; sulfates; phosphates; silicates; humic acids; potassium permanganate; pH; adsorption
DOI:
10.1016/j.watres.2009.06.008
PubMed:
19573891

93. Removal of co-present chromate and arsenate by zero-valent iron in groundwater with humic acid and bicarbonate

Author:
Liu, Tongzhou; Rao, Pinhua; Mak, Mark S.H.; Wang, Peng; Lo, Irene M.C.
Source:
Water research 2009 v.43 no.9 pp. 2540-2548
ISSN:
0043-1354
Subject:
groundwater contamination; arsenates; chromium; iron; humic acids; bicarbonates; electrolytes; pH; arsenic; adsorption; water treatment; chemical degradation; kinetics; iron hydroxides; solubility
DOI:
10.1016/j.watres.2009.03.005
PubMed:
19321187

94. Slurry bioreactor modeling using a dissimilatory arsenate-reducing bacterium for remediation of arsenic-contaminated soil

Author:
Soda, Satoshi; Kanzaki, Masaya; Yamamuara, Shigeki; Kashiwa, Masami; Fujita, Masanori; Ike, Michihiko
Source:
Journal of bioscience and bioengineering 2009 v.107 no.2 pp. 130-137
ISSN:
1389-1723
Subject:
mathematical models; soil bacteria; soil pollution; slurries; arsenic; bioremediation; bioreactors; microbial growth; polluted soils; desorption; adsorption
Abstract:
... A slurry bioreactor using a dissimilatory arsenate (As(V))-reducing bacterium is proposed for remediation of arsenic-contaminated soils. Bacterial As(V) reduction can cause arsenic extraction from the solid to the liquid phase because arsenite, As(III), is much less adsorptive than As(V). A mathematical model was developed incorporating the reversible sorption process of arsenic as well as bacteri ...
DOI:
10.1016/j.jbiosc.2008.09.015
PubMed:
19217550

95. The effects of iron plaque and phosphorus on yield and arsenic accumulation in rice

Author:
Hossain, M. B.; Jahiruddin, M.; Loeppert, R. H.; Panaullah, G. M.; Islam, M. R.; Duxbury, J. M.
Source:
Plant and soil 2009 v.317 no.1-2 pp. 167-176
ISSN:
0032-079X
Subject:
Oryza sativa; adsorption; arsenates; arsenic; ferrous sulfate; grain yield; iron; iron oxides; irrigation water; phosphorus; pot culture; potassium dihydrogen phosphate; rice; roots; soil; solubility; straw; toxicity
Abstract:
... The effects of arsenate, Fe²⁺, and phosphate on amount and composition of Fe-oxide plaque at the rice-root surface and on the yield and arsenic accumulation in rice (cv. BRRI dhan33) were studied in a replicated pot-culture experiment. Arsenic in the form of Na₂HAsO₄ was applied at concentrations of 0, 15 and 30 mg kg⁻¹ in combination with P and/or Fe at 0 and 50 mg kg⁻¹, from KH₂PO₄ and FeSO₄, re ...
DOI:
10.1007/s11104-008-9798-7

96. A sorption kinetics model for arsenic adsorption to magnetite nanoparticles

Author:
Shipley, Heather J.; Yean, Sujin; Kan, Amy T.; Tomson, Mason B.
Source:
Environmental science and pollution research international 2010 v.17 no.5 pp. 1053-1062
ISSN:
0944-1344
Subject:
adsorbents; adsorption; arsenates; arsenic; arsenites; batch systems; bicarbonates; calcium; dissolved organic matter; equations; groundwater; iron; magnesium; magnetite; models; nanoparticles; phosphates; silica; sorption isotherms; sulfates; tap water; Texas
Abstract:
... Introduction Arsenic is a well known water contaminant that causes toxicological and carcinogenic effects. In this work magnetite nanoparticles were examined as possible arsenic sorbents. The objective of this work was to develop a sorption kinetics model, which could be used to predict the amount of arsenic adsorbed by magnetite nanoparticles in the presence of naturally occurring species using a ...
DOI:
10.1007/s11356-009-0259-5
PubMed:
19921525

97. Adsorption of arsenic using high surface area magnetites

Author:
Ohe, Kaoru; Oshima, Tatsuya; Baba, Yoshinari
Source:
Environmental geochemistry and health 2010 v.32 no.4 pp. 283-286
ISSN:
0269-4042
Subject:
adsorption; arsenic; magnetite; sorption isotherms; surface area
Abstract:
... Magnetites (MEBWx) were prepared by precipitation in 1-butanol/water mixtures of various mole ratios of 1-butanol to water. It was found that the magnetites prepared in the mixture with high mole ratio of 1-butanol to water have high specific surface area. The adsorption isotherms of As(III) and As(V) with the magnetites at 303 K fitted the Langmuir model well. The adsorption capacities of the mag ...
DOI:
10.1007/s10653-010-9298-6
PubMed:
20379842

98. Adsorption of arsenic(V) by iron-oxide-coated diatomite (IOCD)

Author:
Yi-Fong Pan; Cary T. Chiou; Tsair-Fuh Lin
Source:
Environmental science and pollution research international 2010 v.17 no.8 pp. 1401-1410
ISSN:
0944-1344
Subject:
adsorbents; adsorption; aqueous solutions; arsenic; diatomaceous earth; heat production; hematite; models; pH; pollution; polyethylene; research; sorption isotherms; surface area; water supply; water treatment
Abstract:
... PURPOSES AND AIMS: Economically efficient methods for removing arsenic from the drinking water supply are urgently needed in many parts of the world. Iron oxides are known to have a strong affinity for arsenic in water. However, they are commonly present in the forms of fine powder or floc, which limits their utility in water treatment. In this study, a novel granular adsorbent, iron-oxide-coated ...
DOI:
10.1007/s11356-010-0325-z
PubMed:
20383794

99. Analytical survey of arsenic in geothermal waters from sites in Kyushu, Japan, and a method for removing arsenic using magnetite

Author:
Yoshizuka, Kazuharu; Nishihama, Syouhei; Sato, Hideki
Source:
Environmental geochemistry and health 2010 v.32 no.4 pp. 297-302
ISSN:
0269-4042
Subject:
adsorbents; adsorption; arsenic; boron; hot springs; magnetite; spatial data; surveys; Japan
Abstract:
... The objective of this study was to survey the cation and anion contents of geothermal waters to gather fundamental information on geographical variations. Sixteen sites in hot spring areas on the island of Kyushu in Japan were studied. The study focused on the arsenic content of the samples. Very high arsenic concentrations (more than 0.1 mg/l) were detected in most of the geothermal waters sample ...
DOI:
10.1007/s10653-010-9300-3
PubMed:
20396934

100. Arsenic adsorption on Ti-pillared montmorillonite

Author:
Na, Ping; Jia, Xiumin; Yuan, Bin; Li, Yuan; Na, Jiyu; Chen, Yuchen; Wang, Linshuang
Source:
Journal of chemical technology and biotechnology 2010 v.85 no.5 pp. 708-714
ISSN:
0268-2575
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; aqueous solutions; arsenic; arsenites; chemical reactions; drinking water; ionic strength; ions; models; montmorillonite; pH; pollution; sorption isotherms; temperature; water purification
Abstract:
... BACKGROUND: Arsenic pollution in drinking water has been found in most countries. Arsenate (As(V)) and arsenite (As(III)) are two major forms of inorganic arsenic species, and the latter is the more toxic. The removal of arsenic ions from water has attracted increased attention, and therefore further understanding and development of techniques for removal of arsenic ions are required.RESULTS: Adso ...
DOI:
10.1002/jctb.2360