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1. Effect of Salinity on the Adsorption Behavior of Methylene Blue onto Comminuted Raw Avocado Residue: CCD-RSM Design

Author:
Schadeck Netto, Matias; da Silva, Nathalia Favarin; Mallmann, Evandro Stoffels; Dotto, Guilherme Luiz; Foletto, Edson Luiz
Source:
Water, air, and soil pollution 2019 v.230 no.8 pp. 187
ISSN:
0049-6979
Subject:
adsorbents; adsorption; avocados; color; decolorization; methylene blue; models; pH; response surface methodology; salinity; seeds; sodium carbonate; sodium citrate; textile mill effluents
Abstract:
... Textile effluents contain a series of dyes and salts, and their decolorization is strongly affected by salinity. In this work, the influence of salinity on methylene blue (MB) adsorption by comminuted raw avocado seeds was investigated. The adsorbent was firstly characterized. The optimal conditions for MB adsorption on the avocado seeds were determined by response surface methodology (RSM). Subse ...
DOI:
10.1007/s11270-019-4230-x

2. Immobilization of Copper from Aqueous Solution and Contaminated Sediment Using Modified Clinoptilolite

Author:
Zhang, Yanhao; Cao, Guoxun; Zhang, Zhibin; Marhaba, Taha; Zhang, Wen
Source:
Water, air, and soil pollution 2019 v.230 no.8 pp. 184
ISSN:
0049-6979
Subject:
adsorption; aqueous solutions; copper; lanthanum; leaching; models; particle size; sediment contamination; sediments; sorption isotherms; toxicity
Abstract:
... The efficiency and mechanism of modified clinoptilolites immobilizing Cu from aqueous solutions and contaminated sediments were investigated. The results showed that the clinoptilolite modified by lanthanum chloride (LaCl₃) at a particle size of 0.5–1.0 mm could remove 65% of Cu²⁺ from 100 mg L⁻¹ of Cu²⁺ solutions at the sorbent:solution mass ratio of 1:100. The equilibrium data fitted well to the ...
DOI:
10.1007/s11270-019-4231-9

3. Natural Sawdust as Adsorbent for the Eriochrome Black T Dye Removal from Aqueous Solution

Author:
Akhouairi, Siham; Ouachtak, Hassan; Addi, Abdelaziz Ait; Jada, Amane; Douch, Jamaa
Source:
Water, air, and soil pollution 2019 v.230 no.8 pp. 181
ISSN:
0049-6979
Subject:
adsorbents; adsorption; aqueous solutions; dyes; electrostatic interactions; equations; industrial wastes; pH; prediction; sawdust; sorption isotherms; wood industry
Abstract:
... This paper deals with the adsorption of an anionic dye, Eriochrome Black T (EBT), from aqueous solutions onto sawdust, which is a natural, eco-friendly, widespread, and a low-cost bio sorbent. The aim of the work is to append values to the wood industry waste. Thus, sawdust was used as adsorbent in both batch reactor (BR) and fixed bed column (FBC), and various operating parameters influencing the ...
DOI:
10.1007/s11270-019-4234-6

4. Performance of Physically and Chemically Activated Biochars in Copper Removal from Contaminated Mine Effluents

Author:
Braghiroli, Flavia Lega; Bouafif, Hassine; Neculita, Carmen Mihaela; Koubaa, Ahmed
Source:
Water, air, and soil pollution 2019 v.230 no.8 pp. 178
ISSN:
0049-6979
Subject:
acid mine drainage; adsorbents; adsorption; biochar; carbon; carbon dioxide; cobalt; copper; drainage; effluents; furnaces; lead; manganese; minerals; moieties; porosity; porous media; potassium hydroxide; pyrolysis; steam; wood residues
Abstract:
... The increasing global demand for metals and minerals justifies the intensive study of treatment options for contaminated mine effluents. The present study evaluated the conversion of wood residues into physically and chemically activated biochars and their subsequent use in the treatment of Cu in synthetic and actual contaminated mine drainage. First, wood residues were converted into biochar by f ...
DOI:
10.1007/s11270-019-4233-7

5. The Recovery of Rare Earth Elements (REEs) from Aqueous Solutions Using Natural Zeolite and Bentonite

Author:
Mosai, Alseno K.; Chimuka, Luke; Cukrowska, Ewa M.; Kotzé, Izak A.; Tutu, Hlanganani
Source:
Water, air, and soil pollution 2019 v.230 no.8 pp. 188
ISSN:
0049-6979
Subject:
adsorbents; adsorption; ammonium sulfate; aqueous solutions; bentonite; cost effectiveness; desorption; industry; ions; models; pH; rare earth elements; surface area; wastewater; zeolites
Abstract:
... Increasing applications of rare earth elements (REEs) and improving technologies have led to increased demand. Because of their limited availability and depletion of most resources, the recovery of these elements from waste has become important. The use of cost-effective materials for this purpose and the high value that can potentially be recovered would be beneficial and attractive to many indus ...
DOI:
10.1007/s11270-019-4236-4

6. Adsorption Characteristic of Cr(VI) onto Different Activated Coal Fly Ashes: Kinetics, Thermodynamic, Application Feasibility, and Error Analysis

Author:
Wang, Nannan; Han, Yanhe; Li, Shuo
Source:
Water, air, and soil pollution 2019 v.230 no.7 pp. 154
ISSN:
0049-6979
Subject:
Gibbs free energy; activation energy; adsorbents; adsorption; chromium; coal; coal fly ash; heat production; hydrogen; kinetics; protons; sorption isotherms; toxic substances
Abstract:
... Raw coal fly ash (RCFA) was recycled as three kinds of adsorbents by hydroxyl anion (OH⁻), hydrogen ion (H⁺), and thermal activation, respectively, for the adsorption of Cr(VI) from water. The H⁺ activation can explore the adsorptive potential of RCFA more effectively than the other two methods. The specific surface areas of the adsorbents are 12.33, 16.32, and 13.89 m² g⁻¹ for OH⁻, H⁺, and therma ...
DOI:
10.1007/s11270-019-4215-9

7. Cd(II) Removal by Novel Fabricated Ground Calcium Carbonate/Nano-TiO2 (GCC/TiO2) Composite from Aqueous Solution

Author:
Wang, Shanguang; Zhou, Dali; Zhou, Jiabei; Liu, Can; Xiao, Xiao; Song, Chengsheng
Source:
Water, air, and soil pollution 2019 v.230 no.7 pp. 147
ISSN:
0049-6979
Subject:
EDTA (chelating agent); Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; adsorbents; adsorption; aqueous solutions; cadmium; calcium; calcium carbonate; electrostatic interactions; heavy metals; ion exchange; ions; models; pH; scanning electron microscopy; sorption isotherms; temperature; titanium; titanium dioxide; toxicity; wastewater
Abstract:
... The heavy metal Cd(II) in wastewater is highly toxic to organisms and must be removed. In this work, an efficient Cd(II) adsorbent consisting of ground calcium carbonate (GCC) and nano-TiO₂ (GCC/TiO₂) was harvested through a facile two-step strategy. Firstly, GCC was immersed in titanium sol which prepared from titanium butoxide to form the precursor. Secondly, GCC/TiO₂ was obtained via hydrotherm ...
DOI:
10.1007/s11270-019-4205-y

8. Hybrid Carbon Nanochromium Composites Prepared from Chrome-Tanned Leather Shavings for Dye Adsorption

Author:
Arcibar-Orozco, Javier A.; Barajas-Elias, Bertha S.; Caballero-Briones, Felipe; Nielsen, Lilja; Rangel-Mendez, Jose R.
Source:
Water, air, and soil pollution 2019 v.230 no.7 pp. 142
ISSN:
0049-6979
Subject:
adsorbents; adsorption; carbon; chromium; dyes; electrostatic interactions; leather; leather tanning; nanoparticles; oxidation; oxides; pH; pyrolysis; tanneries; temperature; toxicity; value-added products; wastes; zinc chloride
Abstract:
... Every year, the leather tanning industry produces substantial quantities of residues such as chrome-tanned leather shavings (CTLS), which contain considerable amounts of Cr(III) salts. The residues have no particular value and under natural conditions can transform into toxic Cr(VI) wastes. The objective of the present work is to evaluate the transformation of these residues into carbon adsorbents ...
DOI:
10.1007/s11270-019-4194-x

9. Dissipation and Adsorption of 2,4-D, Atrazine, Diazinon, and Glyphosate in an Agricultural Soil from Yucatan State, Mexico

Author:
Góngora-Echeverría, Virgilio R.; Martin-Laurent, Fabrice; Quintal-Franco, Carlos; Lorenzo-Flores, Alfonso; Giácoman-Vallejos, Germán; Ponce-Caballero, Carmen
Source:
Water, air, and soil pollution 2019 v.230 no.6 pp. 131
ISSN:
0049-6979
Subject:
2,4-D; adsorption; agricultural soils; aquifers; atrazine; crop yield; diazinon; farmers; farming systems; glyphosate; groundwater; pesticide residues; pollution; risk; soil properties; volatilization; Mexico
Abstract:
... Pesticides are used worldwide in farming activities to guarantee crop yields. In southeastern Mexico, groundwater is the primary source of water for humankind. However, because of the soil characteristics and of intensive agricultural practices, the aquifer is vulnerable to pollution as shown by the regular detection of pesticide residues in groundwater. Within this context, the dissipation and ad ...
DOI:
10.1007/s11270-019-4177-y

10. Efficient Removal of Lead from Water Using Stabilized Iron Sulfide Nanoparticles: Effectiveness and Effects of Stabilizer

Author:
Zhao, Yang; Tian, Shuting; Gong, Yanyan; Zhao, Dongye
Source:
Water, air, and soil pollution 2019 v.230 no.6 pp. 115
ISSN:
0049-6979
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; adsorption; carboxymethylcellulose; chemical precipitation; drinking water; humic acids; ions; kinetics; lead; models; nanoparticles; pH; salts; soil; sorption isotherms; stabilizers; water hardness; water pollution; water solubility
Abstract:
... Fully stabilized FeS nanoparticles were prepared with water-soluble carboxymethyl cellulose (CMC) as a stabilizer, and investigated for adsorption of lead (Pb²⁺) ions from simulated drinking water. The optimum particle stabilization was achieved using 0.0025 wt.% of CMC for 50 mg/L FeS (i.e., CMC-to-FeS molar ratio of 0.0005). The particle stabilization technique increased lead removal from 78.1% ...
DOI:
10.1007/s11270-019-4157-2

11. Evaluation of the Cr(VI) Adsorption Performance of Xanthate Polysaccharides Supported onto Agave Fiber-LDPE Foamed Composites

Author:
Moreno-López, Arturo Y.; González-López, Martín E.; Manríquez-González, Ricardo; González-Cruz, Ricardo; Pérez-Fonseca, Aida A.; Gómez, César; Flores-Cano, José V.; Robledo-Ortíz, Jorge R.
Source:
Water, air, and soil pollution 2019 v.230 no.6 pp. 133
ISSN:
0049-6979
Subject:
Agave; adsorption; cellulose; chemical composition; chitosan; chromium; crosslinking; desorption; models; nuclear magnetic resonance spectroscopy; pH; polyethylene; scanning electron microscopy; sorbents; sorption isotherms; viscose
Abstract:
... In this work, hexavalent chromium adsorption onto LDPE and agave fiber composites coated with chitosan or cellulose was studied in batch experiments. Chemical modifications consisting in cross-linked chitosan, cross-linked chitosan xanthate, and cellulose xanthate were applied to the polysaccharide-coated sorbents in order to increase their stability and adsorption capacity. The sorbents were char ...
DOI:
10.1007/s11270-019-4181-2

12. Removal and Oxidation of Arsenic from Aqueous Solution by Biochar Impregnated with Fe-Mn Oxides

Author:
Lin, Lina; Song, Zhengguo; Huang, Yongchun; Khan, Zulqarnain Haider; Qiu, Weiwen
Source:
Water, air, and soil pollution 2019 v.230 no.5 pp. 105
ISSN:
0049-6979
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; adsorption; aqueous solutions; arsenic; biochar; decontamination; equations; iron oxides; manganese oxides; oxidation; pH; physical properties; sorption isotherms
Abstract:
... We explored the preparation of Fe-Mn oxide-biochar composites and applied them for the removal of arsenic (As) from aqueous solutions. All composites exhibited high As removal efficiencies that increased with increasing pH within the investigated range (pH 3–7). According to the equation fitting for adsorption processes, F₃M₁BC₁₈ (biochar:FeSO₄:KMnO₄, the weight ratios of 18:3:1) had the greatest ...
DOI:
10.1007/s11270-019-4146-5

13. Removal of Silver Nanoparticles from Water Environment: Experimental, Mathematical Formulation, and Cost Analysis

Author:
Syafiuddin, Achmad; Salmiati, Salmiati; Hadibarata, Tony; Salim, Mohd Razman; Kueh, Ahmad Beng Hong; Suhartono, Suhartono
Source:
Water, air, and soil pollution 2019 v.230 no.5 pp. 102
ISSN:
0049-6979
Subject:
Fourier transform infrared spectroscopy; activated carbon; adsorbents; adsorption; agricultural wastes; cost analysis; energy-dispersive X-ray analysis; kinetics; mangoes; mass spectrometry; models; nanosilver; scanning electron microscopy; seed coat; water lilies; water treatment
Abstract:
... This paper deals with the comprehensive analysis for the removal of silver nanoparticles (AgNPs) from water environment. A new activated carbon derived from an agricultural waste, water lily mango seed shells, was proposed as a low-cost adsorbent to remove AgNPs. In addition, a new simple kinetic model was mathematically formulated and then tested using primary and secondary experimental AgNP adso ...
DOI:
10.1007/s11270-019-4143-8

14. UV-Light Catalyzed Reduction of Cr(VI) by Graphene Oxide and its Significance for Cr(VI) Transformation in an Oxisol

Author:
Zhang, Yali; Yang, Jiewen
Source:
Water, air, and soil pollution 2019 v.230 no.5 pp. 103
ISSN:
0049-6979
Subject:
EDTA (chelating agent); Fourier transform infrared spectroscopy; Oxisols; X-ray photoelectron spectroscopy; adsorption; chromium; electrons; epoxides; equations; graphene oxide; irradiation; moieties; pH; photocatalysis; photolysis; pollution; risk; ultraviolet radiation
Abstract:
... Due to its unique properties, the potential application of graphene oxide (GO) in treating environmental pollution has attracted wide attention. In this study, the UV-light catalyzed photoreduction of Cr(VI) by GO was assessed as well as its adsorption toward Cr(VI), and FTIR and XPS techniques were adopted to reveal the underlying mechanisms. The surfaces of GO were negatively charged across the ...
DOI:
10.1007/s11270-019-4161-6

15. Adsorption of Cd(II) From Aqueous Solutions by Modified Biochars: Comparison of Modification Methods

Author:
Qiu, Yue; Zhang, Qian; Li, Meng; Fan, Zixi; Sang, Wenjiao; Xie, Chenfeiyang; Niu, Dongyuan
Source:
Water, air, and soil pollution 2019 v.230 no.4 pp. 84
ISSN:
0049-6979
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; adsorbents; adsorption; aqueous solutions; biochar; bran; cadmium; citric acid; heavy metals; ions; manganese oxides; millets; moieties; potassium permanganate; pyrolysis; sorption isotherms; temperature
Abstract:
... In this study, adsorption experiments on Cd(II) ions in aqueous solution by biochars pyrolyzed from millet bran (MBBC) at 400~800 °C were carried out and MBBC had superior adsorption performance at pyrolysis temperature of 600~800 °C. Then, biochars were modified by potassium permanganate (MBBC-PP), potassium ferrate (MBBC-PF), and citric acid (MBBC-CA). The results showed that the adsorption capa ...
DOI:
10.1007/s11270-019-4135-8

16. Arsenic Removal from a Highly Contaminated Groundwater by a Combined Coagulation-Filtration-Adsorption Process

Author:
Chiavola, A.; D’Amato, E.; Sirini, P.; Caretti, C.; Gori, R.
Source:
Water, air, and soil pollution 2019 v.230 no.4 pp. 87
ISSN:
0049-6979
Subject:
adsorbents; adsorption; air; arsenic; coagulants; coagulation; cost estimates; drainage; drinking water; electrolytes; filtration; groundwater; groundwater contamination; iron; iron oxides; laws and regulations; liquids; mining; mixing; mixing ratio; pH; remediation; sand
Abstract:
... The aim of the present experimental study was to perform a technical-economic evaluation of a combined treatment system, consisting of coagulation-flocculation or rapid sand filtration as pre-treatment followed by column adsorption, for reducing the arsenic concentration from approximately 1 mg/L to below the limit set for groundwater remediation and drinking water, i.e., 0.01 mg/L, according to t ...
DOI:
10.1007/s11270-019-4142-9

17. Biotemplated Synthesis of Hierarchically Porous ZnAl-CLDH/FeWO4 for Effective Removal of Dyes From Water

Author:
Liu, Yong; Wang, Gui; Yang, Wenning; Yang, Jie; Li, Jia
Source:
Water, air, and soil pollution 2019 v.230 no.4 pp. 89
ISSN:
0049-6979
Subject:
X-ray diffraction; active sites; adsorption; energy; energy-dispersive X-ray analysis; hydroxides; kinetics; magnetic fields; microparticles; models; nanoparticles; nanosheets; photocatalysis; scanning electron microscopy; sorption isotherms; thermogravimetry; transmission electron microscopy; wastewater treatment
Abstract:
... Biotemplating method is a promising way to obtain hierarchical materials with unique morphology and property. In the current work, a novel hierarchically porous ZnAl-CLDH (calcined layered double hydroxides)/FeWO₄ had been successfully synthesized by a facile biotemplated method. The obtained samples were characterized in detail via FESEM-EDX, TEM, XRD, IR, TGA, and BET techniques. The as-synthesi ...
DOI:
10.1007/s11270-019-4134-9

18. Comparison of the Removal of an Anionic Dye from Aqueous Solutions by Adsorption with Organically Modified Clays and their Composites

Author:
Saavedra-Labastida, E.; Díaz-Nava, M. C.; Illescas, J.; Muro, C.
Source:
Water, air, and soil pollution 2019 v.230 no.4 pp. 88
ISSN:
0049-6979
Subject:
Fourier transform infrared spectroscopy; adsorbents; adsorption; alginates; aqueous solutions; azo dyes; batch systems; bentonite; cation exchange capacity; cationic surfactants; cetyltrimethylammonium bromide; energy-dispersive X-ray analysis; models; montmorillonite; pH; polymers; scanning electron microscopy; thermogravimetry
Abstract:
... In this study, organoclay and clay-biopolymer composites were evaluated for the adsorption process of an anionic red dye, Allura Red (AR), in aqueous solution. For this purpose, the cationic exchange capacity (CEC) of a natural bentonite was calculated, and it was modified with the cationic surfactant hexadecyltrimethylammonium bromide (OB). Furthermore, a commercial montmorillonite modified with ...
DOI:
10.1007/s11270-019-4131-z

19. Evaluation of the 17-α-Ethinyl Estradiol Sorption Capacity in Soil

Author:
de Oliveira, Renan Angrizani; Tardelli, Edgard Robles; Jozala, Angela Faustino; Grotto, Denise
Source:
Water, air, and soil pollution 2019 v.230 no.4 pp. 85
ISSN:
0049-6979
Subject:
adsorption; drugs; endocrine system; estradiol; high performance liquid chromatography; mathematical models; pH; soil; soil sampling; sorption isotherms; texture; vegetation; Brazil
Abstract:
... 17-α-Ethinyl estradiol (EE2) is a widely used drug that acts in the endocrine system and in the environment; even at low concentrations, it causes extensive damage to organisms. The most relevant factors for understanding the EE2 degradation and transport mechanisms in soil are through sorption studies. This study investigated the sorption capacity of EE2 in soil collected amidst vegetation in the ...
DOI:
10.1007/s11270-019-4136-7

20. Dispersion of Gravel Road Fine-Fractions as Influenced by Oil-Well Produced Water and Simulated Solutions of Various SAR, EC, and Ca/Mg Ratios

Author:
Graber, Kayla; Hargiss, Christina L. M.; DeSutter, Thomas; He, Yangbo; Norland, Jack E.
Source:
Water, air, and soil pollution 2019 v.230 no.3 pp. 61
ISSN:
0049-6979
Subject:
adsorption; calcium; clay; dust; dust control; electrical conductivity; gravel; magnesium; mineralogy; oil fields; sodium
Abstract:
... In the northern Great Plains, a potential road dust abatement is the application of oil-well produced water, also known as “brine.” However, little is known about the effectiveness of brine or its potential impacts on dispersion of road materials and the creation of dusts. This study aimed to investigate how sodium adsorption ratios (SAR), electrical conductivity (EC), and Ca/Mg ratios of simulate ...
DOI:
10.1007/s11270-019-4111-3