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You searched for: Publication year rev 7988-2012 Remove constraint Publication year rev: 7988-2012 Subject term ion exchange Remove constraint Subject term: ion exchange
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1. 1,3-Butadiene Adsorption over Transition Metal Polycation Exchanged Faujasites

Author:
Tsybulevski Albert M.; Kustov Leonid M.; Weston Kerry C.; Greish Alexander A.; Tkachenko Olga P.; Kucherov Alexey V.
Source:
Industrial & Engineering Chemistry Research 2012 v.51 no.20 pp. 7073-7080
ISSN:
1520-5045
Subject:
X-ray absorption spectroscopy; acidity; adsorbents; adsorption; cations; copper; engineering; hydrolysis; ion exchange; liquids; manganese; oligomerization; temperature; zeolites; zinc
Abstract:
... New adsorbents for butadiene removal from liquid and gas streams, which are transition metal (Cu, Zn, Mn) polycation exchanged zeolites, were prepared on the basis of low-silica and dealuminated faujasites by ion exchange with the corresponding salt solutions at the conditions of their partial hydrolysis. Obtained samples were characterized by XANES, ESR, and DRIFT spectroscopy along with equilibr ...
DOI:
10.1021/ie202478c

2. A Laboratory Study of the Treatability of Synthetic Stormwater Under Varying Conditions Using Electric Arc Furnace Steel Slag

Author:
Nnaemeka C. Okochi; Dena W. McMartin
Source:
Water 2012 v.4 no.2 pp. 321-344
ISSN:
2073-4441
Subject:
arc furnaces; copper; dissolved phosphorus; ion exchange; iron; models; pH; particle size; phosphorus; slags; steel; stormwater; stormwater sewer systems; temperature
Abstract:
... The investigation of electric arc furnace (EAF) steel slag as a viable add-on technology to existing stormwater systems for the removal of dissolved phosphorus (P) was extended to explore the effects of varying environmental and treatment system conditions. Parameters such as stormwater composition, P concentration, metal concentration, pH, temperature, slag mass and slag particle size were varied ...
DOI:
10.3390/w4020321

3. A Mass Transfer Coefficient for Radial Flow Adsorption and Ion Exchange

Author:
Hussey Dennis F.; Pandey Ashwini K.; Foutch Gary L.
Source:
Industrial & Engineering Chemistry Research 2012 v.51 no.3 pp. 1429-1434
ISSN:
1520-5045
Subject:
adsorption; engineering; fouling; ion exchange; mass transfer; monitoring; water treatment
Abstract:
... Radial-flow adsorption and ion exchange beds are considered for commercial water treatment processes on occasion, particularly for specialty applications such as nuclear reactor water cleanup. They have significant theoretical potential but some practical flow issues like short circuiting. For more common axial beds, at ultralow concentrations, a key design and operational performance factor is th ...
DOI:
10.1021/ie201399g

4. A Review on the Recent Studies for Chromium Species Adsorption on Raw and Modified Natural Minerals

Author:
V. Dimos; K. J. Haralambous; S. Malamis
Source:
Critical reviews in environmental science and technology 2012 v.42 no.19 pp. 1977-2016
ISSN:
1547-6537
Subject:
adsorption; chromium; environmental protection; health hazards; heavy metals; humans; industrial effluents; ion exchange; minerals; scientists; toxicity; wastewater
Abstract:
... Industrial effluents and human activity pose an imminent danger on the environment. Nowadays, one of the major challenges of scientists is the environmental protection and the prevention of health hazards occurring from heavy metal contamination. Hexavalent chromium has been proven to be one of the most toxic metals in waters and wastewaters. The authors summarize the theoretical aspects concernin ...
DOI:
10.1080/10643389.2011.574102

5. A Superoxide Dismutase Purified from the Rhizome of Curcuma aeruginosa Roxb. as Inhibitor of Nitric Oxide Production in the Macrophage-like RAW 264.7 Cell Line

Author:
Wanwisa Moon-ai; Ploypat Niyomploy; Ruethairat Boonsombat; Polkit Sangvanich; Aphichart Karnchanatat
Source:
Applied biochemistry and biotechnology 2012 v.166 no.8 pp. 2138-2155
ISSN:
0273-2289
Subject:
polyacrylamide gel electrophoresis; chromatography; filtration; chemical industry; inhibitory concentration 50; Curcuma aeruginosa; hydrogen peroxide; riboflavin; macrophages; cellulose; potassium cyanide; oxygen; superoxide dismutase; mice; temperature; antioxidant activity; ammonium sulfate; proteins; ions; nitric oxide; ion exchange; sodium dodecyl sulfate; nitroblue tetrazolium; pH; rhizomes; hydrogen cyanide
Abstract:
... Superoxide dismutase (SOD, EC 1.15.1.1) is a metalloenzyme or antioxidant enzyme that catalyzes the disproportionation of the harmful superoxide anionic radical to hydrogen peroxide and molecular oxygen. Due to its antioxidative effects, SOD has long been applied in medicinal treatment, cosmetic, and other chemical industries. Fifteen Zingiberaceae plants were tested for SOD activity in their rhiz ...
DOI:
10.1007/s12010-012-9640-9
PubMed:
22391698

6. A comparative study on the pyrolysis of metal- and ash-enriched wood and the combustion properties of the gained char

Author:
Zsuzsa A. Mayer; Andreas Apfelbacher; Andreas Hornung
Source:
Journal of analytical and applied pyrolysis 2012 v.96 no. pp. 196-202
ISSN:
0165-2370
Subject:
zinc; wood; calcium; ion exchange; iron; lead; cadmium; magnesium; carbon; combustion; burning; sodium; pyrolysis; vapors; temperature; binding capacity; metal ions; thermal properties
Abstract:
... This study aims to investigate the pyrolysis behaviour of metal-contaminated wood and the combustion properties of char derived from wood pyrolysis. Seven metals (Na, Mg, Ca, Zn, Cd, Pb and Fe(III)) were introduced to willow in cation form by ion-exchange and the thermal behaviour of demineralised samples and samples with additional ash were also investigated. The results show that the char yield ...
DOI:
10.1016/j.jaap.2012.04.007

7. A comparison of mineralogical techniques and potassium adsorption isotherm analysis for relative dating and correlation of Late Quaternary soil chronosequences

Author:
Jeffrey L. Howard; Craig R. Clawson; W. Lee Daniels
Source:
Geoderma 2012 v.179-180 no. pp. 81-95
ISSN:
0016-7061
Subject:
Alfisols; B horizons; Entisols; Inceptisols; adsorption; age of soil; apatite; calcite; chronosequences; clay; ion exchange; lakes; leaching; mica; potassium; quaternary soils; scanning electron microscopy; sediments; soil formation; terraces; weathering; Michigan
Abstract:
... The utility of potassium adsorption isotherm analysis (KIA) for relative dating and correlation of soil chronosequences was assessed by a comparison with some widely used mineralogical techniques. The soils studied, near Detroit, Michigan, are brown (10YR) calcareous Entisols developed in Holocene (~4kA) floodplain sediments, and Inceptisols and Alfisols with redder (7.5YR–5YR) cambic and argillic ...
DOI:
10.1016/j.geoderma.2012.02.020

8. A comparison of overload behaviour for some sub 2μm totally porous and sub 3μm shell particle columns with ionised solutes

Author:
Morgane M. Fallas; Stephan M.C. Buckenmaier; David V. McCalley
Source:
Journal of chromatography 2012 v.1235 no. pp. 49-59
ISSN:
0021-9673
Subject:
chromatography; formic acid; ion exchange; ionic strength; ionization; mass spectrometry; pH; solutes
Abstract:
... The overloading performance of some 2.7μm shell and sub 2μm totally porous columns, including one pair manufactured from similar materials with similar bonding chemistries, was compared using strongly acidic and basic probe compounds. In general, the capacity of shell particles was not greatly reduced, despite containing a smaller porous volume. Nevertheless, at low pH, both types of column were o ...
DOI:
10.1016/j.chroma.2012.02.027

9. A convenient access to 1,3-disubstituted furo[3,4-b]indoles by acid ion-exchange resin-catalyzed furan formation

Author:
Joan Basset; Manel Romero; Thaïs Serra; M. Dolors Pujol
Source:
Tetrahedron 2012 v.68 no.1 pp. 356-362
ISSN:
0040-4020
Subject:
alkylation; chemical structure; derivatization; indoles; ion exchange; resins
Abstract:
... Efficient synthesis of furo[3,4-b]indoles starting from the corresponding indole is reported. The first route involves derivatization, protection, and deprotection steps, which stretch the syntheses. The second method provides a shorter and more efficient strategy to accessing the furoindole. The innovation starts with alkylation at C-2 of the indole presenting at the C-3 position a ketone-acetal, ...
DOI:
10.1016/j.tet.2011.10.022

10. A hydrochemical and geological investigation on the Mambakkam mini watershed, Kancheepuram District, Tamil Nadu

Author:
Packialakshmi Shanmugam; Ambujam N. K.
Source:
Environmental monitoring and assessment 2012 v.184 no.5 pp. 3293-3306
ISSN:
0167-6369
Subject:
acids; alkalinity; alkalis; anthropogenic activities; bicarbonates; calcium; carbonates; chlorides; fertilizers; groundwater; hydrochemistry; ion exchange; ions; irrigation water; magnesium; minerals; potassium; rocks; salinity; socioeconomic development; sodium; sulfates; water hardness; watersheds; weathering; India
Abstract:
... The hydrochemical characterization of groundwater is important to bring out its nature and usefulness. The main objective of this paper was to discuss the major ion chemistry of groundwater in the Mambakkam mini watershed. Besides its semi-arid nature, rapid socioeconomic development encourages a greater demand for water, which leads to uncontrolled groundwater development. The groundwater of the ...
DOI:
10.1007/s10661-011-2189-1
PubMed:
21713469

11. A moving-part-free protamine-sensitive polymeric membrane electrode for sensitive biomedical analyses

Author:
Xuewei Wang; Qing Wang; Wei Qin
Source:
Biosensors & bioelectronics 2012 v.38 no.1 pp. 145-150
ISSN:
0956-5663
Subject:
biosensors; cost effectiveness; detection limit; digestion; electrodes; heparin; ion exchange; sodium; trypsin; trypsin inhibitors
Abstract:
... Traditional potentiometric polyion-sensitive electrodes can only work effectively in samples with vigorous convection fulfilled by magnetic stirrer, electrode rotator, or other moving components. The dependence on complex moving parts prohibits the fabrication of compact, cost-effective, and energy-effective test devices from the commercial point of view. In this paper, a novel potentiometric sens ...
DOI:
10.1016/j.bios.2012.05.020

12. A new alkali-activated steel slag-based cementitious material for photocatalytic degradation of organic pollutant from waste water

Author:
Yao Jun Zhang; Li Cai Liu; Yong Xu; Ya Chao Wang; De Long Xu
Source:
Journal of hazardous materials 2012 v.209-210 no. pp. 146-150
ISSN:
0304-3894
Subject:
calcium; calcium silicate; catalysts; ferrous oxide; ion exchange; ions; methylene blue; nickel; photocatalysis; pollutants; polymerization; reflectance; slags; sodium; steel; synergism; temperature; ultraviolet radiation; wastewater
Abstract:
... A new type of Ni,Ca-cementitious material was firstly synthesized via a two-step reaction of alkali-activated steel slag polymerization and ion exchange. The XRF results showed that almost all the Na⁺ ions in the matrix of Na,Ca-cementitious material were replaced by Ni²⁺ ions at room temperature. The new hydrated products of metahalloysite (Si₂Al₂O₅(OH)₄) and calcium silicate hydrate (CSH) were f ...
DOI:
10.1016/j.jhazmat.2012.01.001

13. A novel amphoteric ion exchange membrane synthesized by radiation-induced grafting α-methylstyrene and N,N-dimethylaminoethyl methacrylate for vanadium redox flow battery application

Author:
Guowen Hu; Yu Wang; Jun Ma; Jingyi Qiu; Jing Peng; Jiuqiang Li; Maolin Zhai
Source:
Journal of membrane science 2012 v.407-408 no. pp. 184-192
ISSN:
0376-7388
Subject:
X-ray photoelectron spectroscopy; absorbed dose; artificial membranes; batteries; ion exchange; ions; permeability; vanadium
Abstract:
... A novel amphoteric ion exchange membrane (AIEM) was synthesized by radiation-induced grafting α-methyl styrene (AMS) and dimethylaminoethyl methacrylate (DMAEMA) into poly(vinylidenedifluoride) (PVDF) films, followed by sulfonation and protonation processes. The monomer AMS could be co-grafted successfully with DMAEMA in the presence of AlCl₃ although it was difficult for AMS to be grafted solely ...
DOI:
10.1016/j.memsci.2012.03.042

14. A novel and cleaner technological process of extracting l-glutamic acid from fermentation broth by two-stage crystallization

Author:
Jianhua Zhang; Lei Tang; Hongjian Zhang; Yuling Yang; Zhonggui Mao
Source:
Journal of cleaner production 2012 v.20 no.1 pp. 137-144
ISSN:
0959-6526
Subject:
ammonia; ammonium sulfate; centrifugation; compound fertilizers; cooling; crystallization; culture media; evaporation; extrusion; glutamic acid; industry; ion exchange; solid wastes; sulfuric acid; sustainable development; value added; wastewater; water pollution; China
Abstract:
... The fermentative l-glutamic acid is one of the important bio-products in the world. In 2009, China produced 1.6 Mt of GA occupying more than 70% of the entire production globally. However, the problems of high sulfuric acid/liquid ammonia consumption and severe pollution in GA production process strongly limit the sustainable development of the fermentative GA industry. In this study, a novel GA e ...
DOI:
10.1016/j.jclepro.2011.08.004

15. A novel bioelectrochemical BOD sensor operating with voltage input

Author:
Oskar Modin; Britt-Marie Wilén
Source:
Water research 2012 v.46 no.18 pp. 6113-6120
ISSN:
0043-1354
Subject:
acetates; alkalinity; bacteria; biochemical oxygen demand; electric current; ethanol; glucose; human resources; ion exchange; microbial fuel cells; organic matter; pH; propionic acid; wastewater; wastewater treatment
Abstract:
... Biochemical oxygen demand (BOD) is a measure of biodegradable compounds in water and is, for example, a common parameter to design and assess the performance of wastewater treatment plants. The conventional method to measure BOD is time consuming (5 or 7 days) and requires trained personnel. Bioelectrochemical BOD sensors designed as microbial fuel cells (MFCs), which are systems where bacteria co ...
DOI:
10.1016/j.watres.2012.08.042
PubMed:
23021520

16. A novel yeast-binding lectin from hemolymph Cyclina sinensis (Gmelin) and its effects on yeast cells

Author:
Changqing Tong; Wei Li; Liang Kong; Chengyu Tan; Min Qu; Qiao Jin; Pavel Lukyanov; Xuqiao Feng
Source:
Process biochemistry 2012 v.47 no.12 pp. 2166-2171
ISSN:
1359-5113
Subject:
Saccharomyces cerevisiae; carbohydrate content; cell growth; cellulose; erythrocytes; ethanol production; fermentation; gel chromatography; gels; hemagglutination; hemolymph; high performance liquid chromatography; ion exchange; lectins; molecular weight; nitric oxide; oligosaccharides; polyacrylamide gel electrophoresis; rabbits; yeasts
Abstract:
... A lectin, Cyclina sinensis (Gmelin) (CSL), was isolated from hemolymph C. sinensis by ion-exchange on Cellulose DE52 and purified by gel filtration on Sephadex G-100 and HPLC on TSK gel G4000PWXL. SDS-PAGE showed that the CSL protein had a molecular mass of 72kDa, had consisted of 40 and 18kDa subunits. The lectin activity of CSL was Ca²⁺-denpendent. The total carbohydrate content of CSL was found ...
DOI:
10.1016/j.procbio.2012.08.007

17. Acidification of Earth: An assessment across mechanisms and scales

Author:
Karen C. Rice; Janet S. Herman
Source:
Applied geochemistry 2012 v.27 no.1 pp. 1-14
ISSN:
0883-2927
Subject:
acid mine drainage; acidification; air; anthropogenic activities; atmospheric deposition; carbon dioxide; coal; combustion; copper; emissions; energy; fertilizer application; groundwater; ion exchange; mining; nitrification; nitrogen fertilizers; oceans; population growth; soil; surface water; weathering
Abstract:
... In this review article, anthropogenic activities that cause acidification of Earth’s air, waters, and soils are examined. Although there are many mechanisms of acidification, the focus is on the major ones, including emissions from combustion of fossil fuels and smelting of ores, mining of coal and metal ores, and application of nitrogen fertilizer to soils, by elucidating the underlying biogeoche ...
DOI:
10.1016/j.apgeochem.2011.09.001

18. Adsorption and Desorption Behavior of Lithium Ion in Spherical PVC–MnO2 Ion Sieve

Author:
Xiao Guoping; Tong Kefeng; Zhou Longsheng; Xiao Jiali; Sun Shuying; Li Ping; Yu Jianguo
Source:
Industrial & Engineering Chemistry Research 2012 v.51 no.33 pp. 10921-10929
ISSN:
1520-5045
Subject:
adsorbents; adsorption; desorption; diffusivity; engineering; equations; hydrochloric acid; ion exchange; lithium; magnesium; manganese oxides; mass transfer; mathematical models; pH; poly(vinyl chloride); potassium; protons; salt lakes; seawater; sodium; solvents; sorption isotherms
Abstract:
... A spherical PVC–MnO₂ ion sieve of 2.0–3.5 mm diameter was prepared by the antisolvent method using synthesized Li₄Mn₅O₁₂ ultrafine powder as the precursor, poly(vinyl chloride) as the binder, and N-methyl-2-pyrrolidone as solvent. Batch experiments of the adsorption capacity (isotherm) and adsorption rate of Li⁺ on the spherical PVC–MnO₂ ion sieve were studied. Spherical PVC–MnO₂ had a high adsorp ...
DOI:
10.1021/ie300087s

19. Adsorption of Cd(II) and Pb(II) onto a one step-synthesized polyampholyte: Kinetics and equilibrium studies

Author:
Guillermo J. Copello; Luis E. Diaz; Viviana Campo Dall’ Orto
Source:
Journal of hazardous materials 2012 v.217-218 no. pp. 374-381
ISSN:
0304-3894
Subject:
adsorbents; adsorption; aqueous solutions; biosorbents; cadmium; ion exchange; lead; nitric acid; pH; polymers; sorption isotherms; tap water
Abstract:
... A one step-synthesized polyampholyte, bearing carboxylate and 2-methylimidazole (2MI) groups, was tested as adsorbent for the removal of Pb(II) and Cd(II) from aqueous solutions. This material combines the benefits of synthetic polymers, such as high adsorption capacity and chemical stability, and the advantages of biosorbents in regard of costs and simplicity of the production. The short time nee ...
DOI:
10.1016/j.jhazmat.2012.03.045

20. Adsorption of Cd(II) from acidic aqueous solutions by tourmaline as a novel material

Author:
CuiPing Wang; BaoLin Wang; JingTing Liu; Li Yu; HongWen Sun; JiZhou Wu
Source:
Chinese science bulletin 2012 v.57 no.24 pp. 3218-3225
ISSN:
1001-6538
Subject:
adsorption; aqueous solutions; cadmium; heavy metals; ion exchange; metal ions; models; pH; sorption isotherms; temperature
Abstract:
... Batch experiments were conducted to investigate the behavior and mechanisms for the adsorption of Cd(II) from aqueous solutions by tourmaline under acidic conditions. The results indicated that the adsorption of Cd(II) significantly depend on the adsorption time, temperature, and the initial concentration of the metal ion. Furthermore, tourmaline had a very good adsorption capacity for Cd(II) in a ...
DOI:
10.1007/s11434-012-5341-6

21. Adsorption of Cd(II), Ni(II), and Zn(II) by Tourmaline at Acidic Conditions: Kinetics, Thermodynamics, and Mechanisms

Author:
Wang Cuiping; Liu Jingting; Zhang Zhiyuan; Wang BaoLin; Sun Hongwen
Source:
Industrial & Engineering Chemistry Research 2012 v.51 no.11 pp. 4397-4406
ISSN:
1520-5045
Subject:
Fourier transform infrared spectroscopy; adsorption; cadmium; endothermy; engineering; heavy metals; ion exchange; metal ions; models; nickel; pH; sorption isotherms; temperature; thermodynamics; zeta potential; zinc
Abstract:
... Batch experiments investigated the effects of time, temperature, and initial concentration of metal ions on heavy metal removal by tourmaline under acidic conditions to evaluate the kinetics, thermodynamics, and mechanisms. The results indicated that the adsorption of Cd(II), Zn(II), and Ni(II) depended significantly on all the above-mentioned parameters. The adsorption kinetics closely followed t ...
DOI:
10.1021/ie2023096

22. Adsorption of Heavy Metals by a Porous Bioadsorbent from Lignocellulosic Biomass Reconstructed in an Ionic Liquid

Author:
Zhong Lin-xin; Peng Xin-wen; Yang Dong; Sun Run-cang
Source:
Journal of agricultural and food chemistry 2012 v.60 no.22 pp. 5621-5628
ISSN:
1520-5118
Subject:
Fourier transform infrared spectroscopy; adsorption; biomass; heavy metals; ion exchange; ionic liquids; metal ions; scanning electron microscopy
Abstract:
... A novel porous bioadsorbent for metal ion binding (Pd²⁺ and Cd²⁺) was successfully prepared from lignocellulosic biomass in ionic liquid by homogeneous succinoylation and sequent chemical cross-linking. The morphology of the bioadsorbent and the interaction between bioadsorbent and metal ions was revealed by scanning electron microscopy and Fourier transform infrared spectroscopy. Results showed t ...
DOI:
10.1021/jf301182x
PubMed:
22559335

23. Adsorption of Proteins onto Ion-Exchange Chromatographic Media: A Molecular Dynamics Study

Author:
Liang Juan; Fieg Georg; Keil Frerich J.; Jakobtorweihen Sven
Source:
Industrial & Engineering Chemistry Research 2012 v.51 no.49 pp. 16049-16058
ISSN:
1520-5045
Subject:
adsorption; agarose; binding sites; cattle; chromatography; engineering; hemoglobin; human serum albumin; ion exchange; isoelectric point; models; molecular dynamics
Abstract:
... Molecular dynamics (MD) simulations with coarse-grained models are used to investigate the adsorption process of proteins onto an ion-exchange chromatographic medium. The adsorption of human serum albumin (HSA) and bovine hemoglobin (bHb) on the anion exchanger Q Sepharose FF is studied. These two proteins have similar molecule sizes with different isoelectric points. To obtain a reliable set of d ...
DOI:
10.1021/ie301407b

24. Adsorption of an anionic dye from aqueous medium by organoclays: equilibrium modeling, kinetic and thermodynamic exploration

Author:
Adarsh S. Bhatt; Praful L. Sakaria; Manu Vasudevan; Radheshyam R. Pawar; N. Sudheesh; Hari C. Bajaj; Haresh M. Mody
Source:
RSC advances 2012 v.2 no.23 pp. 8663-8671
ISSN:
2046-2069
Subject:
Gibbs free energy; adsorbents; adsorption; aqueous solutions; bentonite; cationic surfactants; cetyltrimethylammonium bromide; clay; dyes; endothermy; heat; ion exchange; kinetics; models; sorption isotherms; standard deviation; temperature
Abstract:
... Adsorption of an anionic dye, remazole brilliant blue R (RBBR) from aqueous solution, on organically modified attapulgite (ATP) and bentonite (BNT) clays was investigated. Beneficiated attapulgite and bentonite clay samples were modified by the cationic surfactant cetyltrimethylammoniumbromide (CTAB) by the ion exchange method. The efficiency of these adsorbents for the uptake of RBBR was examined ...
DOI:
10.1039/c2ra20347b

25. Adsorption of arsenate on Cu/Mg/Fe/La layered double hydroxide from aqueous solutions

Author:
Yanwei Guo; Zhiliang Zhu; Yanling Qiu; Jianfu Zhao
Source:
Journal of hazardous materials 2012 v.239-240 no. pp. 279-288
ISSN:
0304-3894
Subject:
adsorbents; adsorption; aqueous solutions; biogeography; chlorides; copper; ion exchange; ions; iron; lanthanum; magnesium; models; nitrates; pH; sorption isotherms
Abstract:
... A novel layered double hydroxide containing lanthanum (Cu/Mg/Fe/La-LDH) has been synthesized and used for the removal of arsenate from aqueous solutions. The purpose of incorporation of La³⁺ into LDHs was tried to enhance the uptake efficiency of arsenate and broaden the application field of LDHs functional materials. Effects of various physico-chemical factors such as solution pH, adsorbent dosag ...
DOI:
10.1016/j.jhazmat.2012.08.075

26. Adsorption of arsenite and selenite using an inorganic ion exchanger based on Fe–Mn hydrous oxide

Author:
Małgorzata Szlachta; Vasyl Gerda; Natalia Chubar
Source:
Journal of colloid and interface science 2012 v.365 no.1 pp. 213-221
ISSN:
0021-9797
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; adsorbents; adsorption; anions; arsenic; arsenites; ion exchange; iron; manganese carbonate; oxidation; pH; selenites; selenium; urea
Abstract:
... The adsorption behaviour and mechanism of As(III) and Se(IV) oxyanion uptake using a mixed inorganic adsorbent were studied. The novel adsorbent, based on Fe(III)–Mn(III) hydrous oxides and manganese(II) carbonate, was synthesised using a hydrothermal precipitation approach in the presence of urea. The inorganic ion exchanger exhibited a high selectivity and adsorptive capacity towards As(III) (up ...
DOI:
10.1016/j.jcis.2011.09.023

27. Adsorption of caesium from aqueous solution using cerium molybdate–pan composite

Author:
A. Nilchi; R. Saberi; H. Azizpour; M. Moradi; R. Zarghami; M. Naushad
Source:
Chemistry in ecology 2012 v.28 no.2 pp. 169-185
ISSN:
1029-0370
Subject:
X-radiation; X-ray diffraction; adsorption; aqueous solutions; cations; cerium; cesium; energy; enthalpy; entropy; fluorescence; infrared spectroscopy; ion exchange; models; pH; scanning electron microscopy; sorption isotherms; temperature; thermogravimetry
Abstract:
... In this study, a cerium molybdate–polyacrylonitrile (CM–PAN) composite ion exchanger was synthesised and its characteristics were determined by X-ray diffraction (XRD), Fourier transformed infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), thermogravimetry (TGA), specific area measurement (BET), X-ray fluorescence and CHN elemental analyses. The adsorption of caesium from aqueous s ...
DOI:
10.1080/02757540.2011.629196

28. Adsorption of methylene blue using green pea peels (Pisum sativum): A cost-effective option for dye-based wastewater treatment

Author:
Ramesh Dod; Goutam Banerjee; S. Saini
Source:
Biotechnology and bioprocess engineering 2012 v.17 no.4 pp. 862-874
ISSN:
1226-8372
Subject:
Pisum sativum; activated carbon; adsorption; agitation; chemical precipitation; dyeing; fabrics; industry; ion exchange; methylene blue; models; nylon; particle size; peas; silk; surface area; temperature; wastewater treatment
Abstract:
... Methylene blue (MB), a common toxic dye, is largely discharged from dyeing processes for acrylic, nylon, silk, and woolen fabrics in textile industries. While application of conventional removal processes like chemical precipitation, ion exchange, commercial activated carbon adsorption, etc often become cost-prohibitive, the adsorption of MB by abundantly available green pea peel (GPP: Pisum sativ ...
DOI:
10.1007/s12257-011-0614-5

29. Adsorptive Removal of Saturated and Unsaturated Fatty Acids Using Ion-Exchange Resins

Author:
Maddikeri Ganesh L.; Pandit Aniruddha B.; Gogate Parag R.
Source:
Industrial & Engineering Chemistry Research 2012 v.51 no.19 pp. 6869-6876
ISSN:
1520-5045
Subject:
adsorption; anion exchange resins; benzene; biodiesel; composite polymers; engineering; fatty acid composition; fatty acids; free fatty acids; heat production; ion exchange; liquids; moieties; raw materials; temperature; vegetable oil
Abstract:
... One of the pretreatment approaches for decreasing the initial acid content of waste vegetable oil or nonedible oils with high initial free fatty acid content, with an objective of obtaining a suitable starting raw material for the production of biodiesel, is the adsorption of the free acids using ion-exchange resins. The present work deals with investigation of adsorption characteristics of satura ...
DOI:
10.1021/ie3000562

30. Aggregation Behaviors of Dodecyl Sulfate-Based Anionic Surface Active Ionic Liquids in Water

Author:
Jiao Jingjing; Dong Bin; Zhang Huina; Zhao Yingyuan; Wang Xiaoqing; Wang Rui; Yu Li
Source:
Journal of physical chemistry 2012 v.116 no.3 pp. 958-965
ISSN:
1520-5207
Subject:
aggregation behavior; aqueous solutions; bromine; cations; electrical conductivity; fluorescence; hydrophobic bonding; ion exchange; ionic liquids; micelles; nuclear magnetic resonance spectroscopy; sodium dodecyl sulfate; sulfates; surface tension; surfactants; temperature; thermodynamics
Abstract:
... Halogen-free, low-cost alkyl sulfate-based surface active ionic liquids (SAILs), 1-butyl-3-methylimidazolium dodecyl sulfate ([C₄mim][C₁₂SO₄]), and N-butyl-N-methylpyrrolidinium dodecyl sulfate ([C₄MP][C₁₂SO₄]) were easily synthesized through ion exchange reaction. The aggregation behaviors of [C₄mim][C₁₂SO₄] and [C₄MP][C₁₂SO₄] in aqueous solution were investigated by surface tension, electric con ...
DOI:
10.1021/jp209276c

31. Aggregation of sodium dodecylsulfate in aqueous nitric acid medium

Author:
Jahar Dey; Kochi Ismail
Source:
Journal of colloid and interface science 2012 v.378 no.1 pp. 144-151
ISSN:
0021-9797
Subject:
electrolytes; equations; fluorescence; hydrogen; hydrolysis; ion exchange; micelles; models; nitric acid; phenols; sodium; sodium dodecyl sulfate; surface tension; surfactants
Abstract:
... Nitric acid medium is invariably used for nitration of organic molecules. Although surfactants are known to influence reaction rates, little is known about the aggregation behavior of surfactants in nitric acid medium. Micellization characteristics of sodium dodecylsulfate (SDS) in aqueous nitric acid are investigated in this work by using the conductance method. The critical micelle concentration ...
DOI:
10.1016/j.jcis.2012.04.015

32. Aluminum-stabilized NASICON-structured Li₃V₂(PO₄)₃

Author:
Yuhao Lu; Long Wang; Jie Song; Dawei Zhang; Maowen Xu; John B. Goodenough
Source:
Journal of materials chemistry A 2012 v.1 no.1 pp. 68-72
ISSN:
2050-7496
Subject:
aluminum; aqueous solutions; cathodes; electrochemistry; ion exchange; lithium; lithium batteries
Abstract:
... The redox couple, V⁴⁺/V³⁺, exhibits a potential of 3.76 V in NASICON-structured Li₃Al₀.₁V₁.₉(PO₄)₃, which is suitable for a cathode material of a lithium-ion battery. The rhombohedral NASICON framework provides a large interstitial space for fast lithium transport, but the structure has to be prepared by the lithium ion-exchange method from NASICON-structured Na₃V₂(PO₄)₃. We used a LiNO₃ aqueous s ...
DOI:
10.1039/c2ta00029f

33. Ammonium pyrrolidine dithiocarbamate anchored Symphoricarpus albus biomass for lead(II) removal: Batch and column biosorption study

Author:
Sibel Tunali Akar; Derya Arslan; Tugba Alp
Source:
Journal of hazardous materials 2012 v.227-228 no. pp. 107-117
ISSN:
0304-3894
Subject:
biomass; biosorbents; biosorption; electrostatic interactions; ion exchange; ionic strength; lead; models; pH; sorption isotherms; temperature
Abstract:
... The biosorption properties of APDC modified S. albus were tested in batch and column conditions. Effective experimental parameters such as pH, biosorbent dosage, contact time, temperature, initial lead(II) ion concentration, flow rate and bed height were investigated. The biosorption capacity of modified biosorbent was at maximum when lead(II) solution pH and biosorbent dosage were 5.5 and 2.0gL⁻¹ ...
DOI:
10.1016/j.jhazmat.2012.05.020

34. An efficient synthesis of highly functionalized dinucleotide cap analogs

Author:
Anilkumar R. Kore; Muthian Shanmugasundaram; Irudaya Charles
Source:
Tetrahedron letters 2012 v.53 no.27 pp. 3518-3520
ISSN:
0040-4039
Subject:
chemical structure; ion exchange; organic compounds
Abstract:
... An efficient synthesis of new cap analogs containing aminoallyl linkers such as m⁷G[5′]pppp[5′]U-aminoallyl and m₂ ⁷,³′ ᴼG[5′]pppp[5′]U-aminoallyl is reported. The final cap analog has been isolated with high purity (>99.8%) after ion-exchange column purification. ...
DOI:
10.1016/j.tetlet.2012.04.133

35. An electrochemically enhanced solid-phase microextraction approach based on molecularly imprinted polypyrrole/multi-walled carbon nanotubes composite coating for selective extraction of fluoroquinolones in aqueous samples

Author:
Xue Liu; Xiaochun Wang; Feng Tan; Hongxia Zhao; Xie Quan; Jingwen Chen; Lianjun Li
Source:
Analytica chimica acta 2012 v.727 no. pp. 26-33
ISSN:
0003-2670
Subject:
antibiotics; carbon nanotubes; coatings; desorption; detection limit; electrochemistry; electrodes; electrophoresis; fluoroquinolones; high performance liquid chromatography; hydrogen bonding; ion exchange; ionic strength; ions; molecular imprinting; nanocomposites; pH; soil sampling; solid phase microextraction; solvents; urine
Abstract:
... In this study, an electrochemically enhanced solid-phase microextraction (EE-SPME) approach based on molecularly imprinted polypyrrole/multi-walled carbon nanotubes (MIPPy/MWCNTs) composite coating on Pt wire was developed for selective extraction of fluoroquinolone antibiotics (FQs) in aqueous samples. During the extraction, a direct current potential was applied to the MIPPy/MWCNTs/Pt fiber as w ...
DOI:
10.1016/j.aca.2012.03.054

36. An extracellular serine protease of an isolate of Duddingtonia flagrans nematophagous fungus

Author:
Fabio R. Braga; Jackson V. Araújo; Filippe E.F. Soares; Hugo L.A. Geniêr; José H. Queiroz
Source:
Biocontrol science and technology 2012 v.22 no.10 pp. 1131-1142
ISSN:
1360-0478
Subject:
Cyathostominae; bioactive properties; biological control; copper sulfate; enzyme activity; ion exchange; larvae; metal ions; nematophagous fungi; pH; serine proteinases; temperature
Abstract:
... This study aimed to present a protease produced by Duddingtonia flagrans fungus (AC001), and to evaluate its activity in the biological control of cyathostomin infective larvae (L₃). The crude extract from D. flagrans grown in liquid medium was applied first to a DEAE-Sepharose™ and later to a CM-Sepharose™ ion exchange column. Protease activity was determined under different pHs and temperatures. ...
DOI:
10.1080/09583157.2012.713912

37. An extracellular serine protease produced by Vibrio vulnificus NCIMB 2137, a metalloprotease-gene negative strain isolated from a diseased eel

Author:
Shin-ichi Miyoshi; Jiyou Wang; Keizo Katoh; Mitsutoshi Senoh; Tamaki Mizuno; Yoko Maehara
Source:
World journal of microbiology & biotechnology 2012 v.28 no.4 pp. 1633-1639
ISSN:
0959-3993
Subject:
Vibrio vulnificus; ammonium sulfate; bacteria; chromatography; eel; filtration; fractionation; humans; ion exchange; operon; serine proteinases; shrimp; virulence
Abstract:
... Vibrio vulnificus is a ubiquitous estuarine microorganism but causes fatal systemic infections in immunocompromised humans, cultured eels or shrimps. An extracellular metalloprotease VVP/VvpE has been reported to be a potential virulence factor of the bacterium; however, a few strains isolated from a diseased eel or shrimp were recently found to produce a serine protease termed VvsA, but not VVP/V ...
DOI:
10.1007/s11274-011-0969-y
PubMed:
22805945

38. Anaesthesia of farmed fish: implications for welfare

Author:
Inger Hilde Zahl; Ole Samuelsen; Anders Kiessling
Source:
Fish physiology and biochemistry 2012 v.38 no.1 pp. 201-218
ISSN:
0920-1742
Subject:
acidosis; adverse effects; analgesic effect; analgesics; anesthetics; animal injuries; animal welfare; benzocaine; blood; body weight; combination drug therapy; cortisol; depth of anesthesia; farmed fish; ion exchange; margin of safety; medicine; netting; nociception; sedation; slaughter; sorting; stress response; surgery; vaccination; water temperature
Abstract:
... During their life cycle as farmed animals, there are several situations in which fish are subjected to handling and confinement. Netting, weighing, sorting, vaccination, transport and, at the end, slaughter are frequent events under farming conditions. As research subjects, fish may also undergo surgical procedures that range from tagging, sampling and small incisions to invasive procedures. In th ...
DOI:
10.1007/s10695-011-9565-1
PubMed:
22160749

39. Analyzing freely dissolved concentrations of cationic surfactant utilizing ion-exchange capability of polyacrylate coated solid-phase microextraction fibers

Author:
Yi Chen; Steven T.J. Droge; Joop L.M. Hermens
Source:
Journal of chromatography 2012 v.1252 no. pp. 15-22
ISSN:
0021-9673
Subject:
calcium chloride; aqueous solutions; cation exchange capacity; sorption; ion exchange; humic acids; cations; chromatography; risk assessment; pH; solid phase microextraction; sorption isotherms; cationic surfactants
Abstract:
... A 7-μm polyacrylate (PA) coated fiber was successfully employed to determine freely dissolved concentrations of cationic surfactants by solid-phase microextraction (SPME) and utilizing the capability of the PA-coating to sorb organic cations via ion-exchange at carboxylic groups. Measured fiber–water partitioning coefficients (Kfw) were constant below a fiber loading of 2mmol per liter polyacrylat ...
DOI:
10.1016/j.chroma.2012.06.080

40. Applicability of analytical and preparative monolithic columns to the separation and isolation of major whey proteins

Author:
Alen Albreht; Irena Vovk
Source:
Journal of chromatography 2012 v.1227 no. pp. 210-218
ISSN:
0021-9673
Subject:
beta-lactoglobulin; detection limit; high performance liquid chromatography; ion exchange; mass spectrometry; pH; whey protein
Abstract:
... The separation and isolation of major whey proteins is already extensively covered in the literature although no study has been published in which monolithic columns were used. In our research we present, for the first time, the use of short convective interaction media (CIM) monolithic columns for the separation of all major whey proteins and isolation of β-lactoglobulin variant A and B (β-LgA an ...
DOI:
10.1016/j.chroma.2012.01.011

41. Application of the simplex method for optimization of chromatographic analysis of biogenic amines in fish

Author:
Juan Antonio Sánchez; Claudia Ruiz-Capillas
Source:
European food research & technology 2012 v.234 no.2 pp. 285-294
ISSN:
1438-2377
Subject:
agmatine; bream; cadaverine; detection limit; high performance liquid chromatography; histamine; ion exchange; isopropyl alcohol; putrescine; sardines; spermidine; spermine; system optimization; tryptamine; tyramine
Abstract:
... The aim of this study was to optimize the separation of biogenic amines with ion-exchange high-performance liquid chromatography, using the modified simplex method. A modified chromatographic response function was used, and two methodological parameters were selected as simplex variables: the proportion of the organic solvent 2-propanol in the mobile phases, added as a new mobile phase, and the va ...
DOI:
10.1007/s00217-011-1622-6

42. Appraisal and evolution of hydrochemical processes from proximity basalt and granite areas of Deccan Volcanic Province (DVP) in India

Author:
Sahebrao Sonkamble; Ashalata Sahya; N.C. Mondal; P. Harikumar
Source:
Journal of hydrology 2012 v.438-439 no. pp. 181-193
ISSN:
0022-1694
Subject:
absorption; alkalis; anions; aquifers; basalt; calcite; cations; computer software; digital elevation models; dolomite; granite; groundwater; ion exchange; irrigation; permeability; salinity; silicates; sodium; sodium carbonate; water quality; water table; weathering; India
Abstract:
... This paper deals with a systematic hydrochemical study carried out at proximity basalt and granite areas of Deccan Volcanic Province (DVP) in India to assess groundwater quality and evaluate the hydrochemical processes. A total of 40 groundwater samples were collected equally from these areas and analyzed. Results showed that the groundwaters rich in alkaline earth in the basalt and alkali rich el ...
DOI:
10.1016/j.jhydrol.2012.03.022

43. Arsenic(III) sorption on nanostructured cerium incorporated manganese oxide (NCMO): A physical insight into the mechanistic pathway

Author:
K. Gupta; S. Bhattacharya; D. Nandi; A. Dhar; A. Maity; A. Mukhopadhyay; D.J. Chattopadhyay; N.R. Ray; P. Sen; U.C. Ghosh
Source:
Journal of colloid and interface science 2012 v.377 no.1 pp. 269-276
ISSN:
0021-9797
Subject:
Fourier transform infrared spectroscopy; arsenic; cerium; desorption; energy; entropy; equations; ion exchange; manganese oxides; models; pH; sorption isotherms
Abstract:
... Arsenic(III) sorption was investigated with nanostructured cerium incorporated manganese oxide (NCMO). The pH between 6.0 and 8.0 was optimized for the arsenic(III) sorption. Kinetics and equilibrium data (pH=7.0±0.2, T=303±1.6K, and I=0.01M) of arsenic(III) sorption by NCMO described, respectively, the pseudo-second order and the Freundlich isotherm equations well. The sorption process was somewh ...
DOI:
10.1016/j.jcis.2012.01.066

44. Assessment of the quality and toxicity of the discharges of a wastewater treatment plant and alternatives to improve its operation

Author:
Daniel Robles-Vargas; Sandra Margarita Montoya-Castillo; Francisco Javier Avelar-gonzález; Juan Jauregui-Rincón; Francisco Javier Rodríguez-Valadez; Roberto Rico-Martínez
Source:
Journal of environmental science and health 2012 v.47 no.4 pp. 589-597
ISSN:
1532-4117
Subject:
Phanerochaete chrysosporium; activated carbon; adsorption; chemical oxygen demand; developing countries; electrochemistry; ion exchange; oxidation; planning; resins; surface water; toxicity; wastewater; wastewater treatment; white-rot fungi; zeolites
Abstract:
... Wastewater discharges into freshwater bodies represent a serious ecological problem worldwide. In underdeveloped and developing countries wastewater treatment plants (WTP) only count with basic treatment, leading to the pollution of important aquatic reservoirs causing critical situations. In the present work, a one year evaluation of toxicity and main physical and chemical parameters of one of th ...
DOI:
10.1080/10934529.2012.650578
PubMed:
22375542

45. Attachment of the Sulfonic Acid Group in the Interlayer Space of a Layered Alkali Silicate, Octosilicate

Author:
Nakamura Takanori; Ogawa Makoto
Source:
Langmuir 2012 v.28 no.19 pp. 7505-7511
ISSN:
1520-5827
Subject:
ion exchange; silicates; sulfonic acids; ions
Abstract:
... The surface modification of a layered alkali silicate, octosilicate (Na₂Si₈O₁₇·nH2O), with a sulfonic acid group was conducted. The sulfonic acid group was attached to the silicate layer by the reaction of octosilicate with phenethyl(dichloro)methylsilane and the subsequent sulfonation of the attached phenethyl groups with chlorosulfonic acid. The modified octosilicate is a solid acid as indicated ...
DOI:
10.1021/la300390s

46. Berberine increases the expression of NHE3 and AQP4 in sennosideA-induced diarrhoea model

Author:
Yongguo Zhang; Xin Wang; Sumei Sha; Shuli Liang; Lina Zhao; Lin Liu; Na Chai; Honghong Wang; Kaichun Wu
Source:
Fitoterapia 2012 v.83 no.6 pp. 1014-1022
ISSN:
0367-326X
Subject:
Western blotting; absorption; animal models; antidiarrheal effect; antimicrobial properties; berberine; diarrhea; drugs; high performance liquid chromatography; intestinal mucosa; ion exchange; messenger RNA; mice; protein kinase C; protein synthesis; China
Abstract:
... Berberine, a compound isolated from Chinese Goldthread Rhizome, has been widely used as a non-prescription drug to treat diarrhoea in China. Previous studies have demonstrated multiple pharmacological activities for berberine, including its significant role in antimicrobial activity. However, its effect on ion exchange and water transfer remains unclear. The present study aims to explore the effec ...
DOI:
10.1016/j.fitote.2012.05.015
PubMed:
22668974

47. Biochemical and enzymatic characterization of BpMP-I, a fibrinogenolytic metalloproteinase isolated from Bothropoides pauloensis snake venom

Author:
Dayane L. Naves de Souza; Mário Sérgio R. Gomes; Francis Barbosa Ferreira; Renata Santos Rodrigues; David Collares Achê; Michael Richardson; Márcia Helena Borges; Veridiana M. Rodrigues
Source:
Comparative biochemistry and physiology 2012 v.161 no.2 pp. 102-109
ISSN:
1096-4959
Subject:
EDTA (chelating agent); Viperidae; amino acid sequences; beta-mercaptoethanol; cattle; chromatography; fibrinogen; hemorrhage; ion exchange; metalloproteinases; mice; pH; plasmin; polyacrylamide gel electrophoresis; polypeptides; proteolysis; snakes; temperature; tissue kallikrein; venoms
Abstract:
... Snake Venom Metalloproteinases (SVMPs) are the most abundant components present in Viperidae venom. They are important in the induction of systemic alterations and local tissue damage after envenomation. In the present study, a metalloproteinase named BpMPI was isolated from Bothropoides pauloensis snake venom and its biochemical and enzymatic characteristics were determined. BpMPI was purified in ...
DOI:
10.1016/j.cbpb.2011.10.002

48. Biosorption and biotransformation of chromium by Serratia sp. isolated from tannery effluent

Author:
Shaili Srivastava; Indu Shekhar Thakur
Source:
Environmental technology 2012 v.33 no.1 pp. 113-122
ISSN:
1479-487X
Subject:
Serratia; X-radiation; X-ray diffraction; bacteria; biosorption; biotransformation; calcium; chromium; crystals; cytoplasm; environmental technology; ion exchange; leather tanning; microbial biomass; phosphates; ribosomal DNA; sediments; soil; tanneries; tannery effluents; transmission electron microscopy; wastewater
Abstract:
... A bacterium isolated from soil and sediment of a leather tanning mill's effluent was identified as Serratia sp. by the analysis of 16S rDNA. Scanning electron microscopy–energy dispersive X-ray analysis (SEM-EDX) and transmission electron microscopy (TEM) were used to assess morphological changes and confirm chromium biosorption in Serratia sp. both in a shake-flask culture containing chromium and ...
DOI:
10.1080/09593330.2011.551842

49. Biosorption behavior and mechanism of heavy metals by the fruiting body of jelly fungus (Auricularia polytricha) from aqueous solutions

Author:
Haiwei Huang; Lixiang Cao; Yuxuan Wan; Renduo Zhang; Wenfeng Wang
Source:
Applied microbiology and biotechnology 2012 v.96 no.3 pp. 829-840
ISSN:
0175-7598
Subject:
Auricularia polytricha; Fourier transform infrared spectroscopy; Tremellales; amines; aqueous solutions; desorption; fruiting bodies; heavy metals; ion exchange; models; pH; sorption isotherms; water pollution
Abstract:
... The aim of this study was to investigate the biosorption characteristics of Cd²⁺, Cu²⁺, and Pb²⁺ by the fruiting body of jelly fungus Auricularia polytricha. Batch experiments were conducted to characterize the kinetics, equilibrium, and mechanisms of the biosorption process. Optimum values of pH 5, biomass dosage 4 g L⁻¹, and contact time 60 min provided maximum biosorption capacities of A. polyt ...
DOI:
10.1007/s00253-011-3846-6
PubMed:
22234535

50. Biosorption of aquatic cadmium(II) by unmodified rice straw

Author:
Yang Ding; Debing Jing; Huili Gong; Lianbi Zhou; Xiaosong Yang
Source:
Bioresource technology 2012 v.114 no. pp. 20-25
ISSN:
0960-8524
Subject:
cadmium; carboxylic acids; chelation; effluents; heavy metals; ion exchange; mining; pH; rice; rice straw; toxicity
Abstract:
... Cadmium is the most common toxic metal threatening safe rice supply. Rice straw has the potential to remove Cd from large-scale effluent contaminated by heavy metals since it exhibited a short biosorption equilibrium time of 5min, high biosorption capacity (13.9mgg⁻¹) and high removal efficiency at a pH range of 2.0–6.0. The main Cd biosorption mechanism was Cd²⁺ ion exchange with K⁺, Na⁺, Mg²⁺ an ...
DOI:
10.1016/j.biortech.2012.01.110
PubMed:
22445266