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Novikau R, Lujaniene G. Adsorption behaviour of pollutants: Heavy metals, radionuclides, organic pollutants, on clays and their minerals (raw, modified and treated): A review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 309:114685. [PMID: 35151139 DOI: 10.1016/j.jenvman.2022.114685] [Citation(s) in RCA: 35] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 01/06/2022] [Accepted: 02/04/2022] [Indexed: 06/14/2023]
Abstract
The increasing anthropogenic pressure results in environmental pollution and thus adversely affects the integrity of ecosystems. Consequently, various methods of removing pollutants from effluents have been developed and used to minimise this negative impact, with adsorption on clay minerals identified as the most promising approach. This review examines the adsorption of heavy metals, radionuclides, and organic pollutants on clays/clay minerals and their composites under diverse conditions and deals with the applications of these materials in the construction of engineering barriers for waste management. Additionally, we discuss the efficiency and mechanisms of pollutant adsorption on clays subjected to various treatments and modifications while describing the beneficial effects of such modification/treatment on adsorption performance, reusability, and in vivo/in vitro toxicity.
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Affiliation(s)
- Raman Novikau
- Department of Environmental Research, State Research Institute Center for Physical Sciences and Technology, Savanoriu Ave. 231, Vilnius, 02300, Lithuania.
| | - Galina Lujaniene
- Department of Environmental Research, State Research Institute Center for Physical Sciences and Technology, Savanoriu Ave. 231, Vilnius, 02300, Lithuania.
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2
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Xu Q, Liu T, Li L, Liu B, Wang X, Zhang S, Li L, Wang B, Zimmerman AR, Gao B. Hydrothermal carbonization of distillers grains with clay minerals for enhanced adsorption of phosphate and methylene blue. BIORESOURCE TECHNOLOGY 2021; 340:125725. [PMID: 34385129 DOI: 10.1016/j.biortech.2021.125725] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 07/31/2021] [Accepted: 08/03/2021] [Indexed: 06/13/2023]
Abstract
A novel one-pot synthesis method was developed to prepare modified hydrochar by co-hydrothermal carbonization of waste distillers grains using low-cost clay minerals (attapulgite or vermiculite). The loading of the clay minerals onto hydrochar surfaces altered the structure and surface composition of the hydrochar such that the clay-modified hydrochars showed better ability to adsorb methylene blue and phosphate in aqueous solution than the pristine hydrochar. The maximum methylene blue and phosphate adsorption capacities of the modified hydrochar reached 340.3 and 96.9 mg g-1, respectively, comparable or higher than that of many commercial sorbents. Multiple mechanisms, including electrostatic attraction, ion exchange, complexation, and physical adsorption, controlled the adsorption process. These results highlight excellent potential for distillers grains-derived hydrochar-clay composites as an environmental sorbent, capable of removing a variety of contaminants from aqueous solutions.
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Affiliation(s)
- Qingya Xu
- College of Eco-Environmental Engineering, Institute of Karst Wetland Ecology, Guizhou Minzu University, Guiyang 550025, Guizhou, PR China; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, PR China
| | - Taoze Liu
- College of Eco-Environmental Engineering, Institute of Karst Wetland Ecology, Guizhou Minzu University, Guiyang 550025, Guizhou, PR China.
| | - Ling Li
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, PR China
| | - Bangyu Liu
- College of Architectural Engineering, Guizhou Minzu University, Guiyang 550025, Guizhou, PR China
| | - Xiaodan Wang
- College of Eco-Environmental Engineering, Institute of Karst Wetland Ecology, Guizhou Minzu University, Guiyang 550025, Guizhou, PR China
| | - Shuyi Zhang
- College of Eco-Environmental Engineering, Institute of Karst Wetland Ecology, Guizhou Minzu University, Guiyang 550025, Guizhou, PR China
| | - Liangliang Li
- College of Eco-Environmental Engineering, Institute of Karst Wetland Ecology, Guizhou Minzu University, Guiyang 550025, Guizhou, PR China
| | - Bing Wang
- College of Resources and Environment Engineering, Guizhou University, Guiyang 550025, Guizhou, PR China
| | - Andrew R Zimmerman
- Department of Geological Sciences, University of Florida, Gainesville, FL 32611, USA
| | - Bin Gao
- Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL 32611, USA
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Antonelli R, Martins FR, Malpass GRP, da Silva MGC, Vieira MGA. Ofloxacin adsorption by calcined Verde-lodo bentonite clay: Batch and fixed bed system evaluation. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113718] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Khunjan U, Kasikamphaiboon P. Green Synthesis of Kaolin-Supported Nanoscale Zero-Valent Iron Using Ruellia tuberosa Leaf Extract for Effective Decolorization of Azo Dye Reactive Black 5. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2020. [DOI: 10.1007/s13369-020-04831-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Costa F, Tavares T. Pilot-scale sorption studies of diethylketone in the presence of Cd 2+ and Ni 2. ENVIRONMENTAL TECHNOLOGY 2019; 40:942-953. [PMID: 29187066 DOI: 10.1080/09593330.2017.1411979] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2017] [Accepted: 11/24/2017] [Indexed: 06/07/2023]
Abstract
The effect of pH on the sorption capacity of vermiculite towards cadmium and nickel was tested in batch systems and it was shown that the sorption percentages increase with an increase in the mass of vermiculite and with an increase in the initial pH. Maximum sorption percentages were obtained for a pH of 8 and 4 g of vermiculite (86.5% for Cd2+ and 86.1% for Ni2+, for solutions with 100 mg/L of metal). As a consequence, it was possible to establish a range of optimal pH for biosorption processes, by combining the so determined optimal sorption pH of vermiculite with the optimal growth pH of Streptococcus equisimilis, a bacterium used to treat contaminated water. Pilot-scale experiments with a S. equisimilis biofilm supported on vermiculite were conducted in closed-loop conditions, aiming to treat large volumes of diethylketone aqueous solutions, eventually containing Cd2+ or Ni2+. The excellent capacity of this joint system to simultaneously biodegrade diethylketone and biosorb Cd2+ or Ni2+was proved. The removal percentage and the uptake increase through time, even with the replacement of the initial solution by new ones. The breakthrough curves that best describe the results achieved for Cd2+ and Ni2+ are respectively the Adams-Bohart and the Yoon and Nelson model.
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Affiliation(s)
- Filomena Costa
- a Centre of Biological Engineering , University of Minho , Braga , Portugal
| | - Teresa Tavares
- a Centre of Biological Engineering , University of Minho , Braga , Portugal
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Sen M, Dana K, Das N. Development of LTA zeolite membrane from clay by sonication assisted method at room temperature for H 2-CO 2 and CO 2-CH 4 separation. ULTRASONICS SONOCHEMISTRY 2018; 48:299-310. [PMID: 30080554 DOI: 10.1016/j.ultsonch.2018.06.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 05/18/2018] [Accepted: 06/13/2018] [Indexed: 06/08/2023]
Abstract
In this work, sodium aluminosilicate zeolite powder and membranes were synthesized by ultrasonic irradiation at room temperature using montmorillonite clay as precursor material. For comparison, same zeolite powder and membranes were synthesized at 100 °C also. The synthesized zeolites were characterized by X-ray diffraction (XRD), infrared (IR) spectral analysis, and field-emission scanning electron microscopy (FESEM). XRD and IR results showed that phase pure mainly LTA phase was formed after 15 days of aging at room temperature. By using the zeolite powders as seeds, membranes were synthesized on clay alumina support tubes at room temperature and also at 100 °C. In both the cases membranes were formed on support surface. The membrane thickness was found to be 15 μm. The performances of the membranes were evaluated by single gas as well as mixture gas permeation measurement for H2-CO2 and CO2-CH4 respectively. The H2-CO2 and CO2-CH4 separation selectivity for the mixture gas of the membrane was found to 16.2 and 20.9 at room temperature respectively. To the best of our knowledge, there is no report of synthesis of zeolite membrane at room temperature using clay as raw materials. For the first time we have reported the synthesis of alumino-silicate zeolite membrane on clay alumina support surface using clay as starting material by sonochemical method at room temperature.
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Affiliation(s)
- Mitali Sen
- Ceramic Membrane Division, CSIR-Central Glass & Ceramic Research Institute, Kolkata 700 032, India
| | - Kausik Dana
- Clay and Traditional Ceramics Division, CSIR-Central Glass & Ceramic Research Institute, Kolkata 700 032, India
| | - Nandini Das
- Ceramic Membrane Division, CSIR-Central Glass & Ceramic Research Institute, Kolkata 700 032, India.
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7
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Ability of a montmorillonitic clay to interact with cationic and anionic dyes in aqueous solutions. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2017.10.038] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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8
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Ojo TA, Ojedokun AT, Bello OS. Functionalization of powdered walnut shell with orthophosphoric acid for Congo red dye removal. PARTICULATE SCIENCE AND TECHNOLOGY 2017. [DOI: 10.1080/02726351.2017.1340914] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Titilope Abiodun Ojo
- Department of Pure and Applied Chemistry, Ladoke Akintola University of Technology, Ogbomoso, Oyo, Nigeria
| | - Adedamola Titi Ojedokun
- Department of Pure and Applied Chemistry, Ladoke Akintola University of Technology, Ogbomoso, Oyo, Nigeria
| | - Olugbenga Solomon Bello
- Department of Pure and Applied Chemistry, Ladoke Akintola University of Technology, Ogbomoso, Oyo, Nigeria
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Costa F, Tavares T. Sorption studies of diethylketone in the presence of Al 3+, Cd 2+, Ni 2+ and Mn 2+, from lab-scale to pilot scale. ENVIRONMENTAL TECHNOLOGY 2017; 38:2811-2823. [PMID: 28054835 DOI: 10.1080/09593330.2016.1278462] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Accepted: 12/28/2016] [Indexed: 06/06/2023]
Abstract
The toxic effects of diethylketone (DEK) in aqueous solution with different concentrations of Al3+, Cd2+, Ni2+ and Mn2+ were evaluated at lab-scale. It was established that Streptococcus equisimilis is able to efficiently remove DEK with different concentrations with heavy metals. It was proved that this joint-system has excellent capacity to biodegrade high concentrations of DEK in the presence of Al3+, Cd2+, Ni2+ and Mn2+. With the exception of Al3+, the uptake for all metals increased as the initial concentration of each metal in the mixed solution increased. The breakthrough curves are best described by the Adams and Bohart model for Cd2+, by the Yoon and Nelson model for Ni2+ and by the Wolborska model for Mn2+.
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Affiliation(s)
- Filomena Costa
- a Centre of Biological Engineering , University of Minho , Braga , Portugal
| | - Teresa Tavares
- a Centre of Biological Engineering , University of Minho , Braga , Portugal
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Jain SK, Shakil NA, Dutta A, Kumar J, Saini MK. Sorption kinetics and isotherm modelling of imidacloprid on bentonite and organobentonites. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2017; 52:326-337. [PMID: 28277079 DOI: 10.1080/03601234.2017.1281653] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Bentonite was modified by quaternary ammonium cations viz. cetytrimethylammonium (CTA), cetylpyridinium (CP), rioctylmethylammonium (TOM) and pcholine (PTC) at 100% cation exchange capacity of bentonite and was characterized by X-ray diffraction, CHNS elemental analyser and Fourier transform infrared spectroscopy. The sorption of imidacloprid on organobentonites/bentonite was studied by batch method. Normal bentonite could adsorb imidacloprid only upto 19.31-22.18% while all organobentonites except PTC bentonite (PTCB), enhanced its adsorption by three to four times. Highest adsorption was observed in case of TOM bentonite (TOMB) (76.94-83.16%). Adsorption kinetic data were fitted to pseudo-first-order, pseudo-second-order and intraparticle diffusion models. For normal bentonite data were best fitted to pseudo-first-order kinetic, while for organobentonites fitted to pseudo-second-order kinetics. Sorption data were analysed using Freundlich, Langmuir, Temkin and Dubinin-Radushkevich isotherm models. Data were well fitted to Freundlich adsorption isotherm. Product of Freundlich adsorption constant and heterogeneity parameter (Kf.1/n) was in following order: TOMB (301.87) > CTA bentonite (CTAB) (152.12) > CP bentonite (CPB) (92.58) > bentonite (27.25). Desorption study confirmed hysteresis and concentration dependence. The present study showed that the organobentonite could be a good sorbent for removal of imidacloprid from natural water sample also. Percentage adsorption and Distribution coefficient (mL g-1) value of different adsorbent was in following order: TOMB (74.85% and 297.54) > CTAB (55.78% and 126.15) > CPB (45.81% and 84.55) > bentonite (10.65% and 11.92).
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Affiliation(s)
- Shailesh K Jain
- a ICAR-Division of Agricultural Chemicals , Indian Agricultural Research Institute , New Delhi , India
| | - Najam A Shakil
- a ICAR-Division of Agricultural Chemicals , Indian Agricultural Research Institute , New Delhi , India
| | - Anirban Dutta
- a ICAR-Division of Agricultural Chemicals , Indian Agricultural Research Institute , New Delhi , India
| | - Jitendra Kumar
- a ICAR-Division of Agricultural Chemicals , Indian Agricultural Research Institute , New Delhi , India
- b ICAR-Directorate of Medicinal & Aromatic Plants Research , Anand , Gujarat , India
| | - Mukesh K Saini
- a ICAR-Division of Agricultural Chemicals , Indian Agricultural Research Institute , New Delhi , India
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11
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Sturini M, Speltini A, Maraschi F, Profumo A, Tarantino S, Gualtieri AF, Zema M. Removal of fluoroquinolone contaminants from environmental waters on sepiolite and its photo-induced regeneration. CHEMOSPHERE 2016; 150:686-693. [PMID: 26796589 DOI: 10.1016/j.chemosphere.2015.12.127] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2015] [Revised: 11/27/2015] [Accepted: 12/29/2015] [Indexed: 05/27/2023]
Abstract
Sepiolite is studied as sorbent for removal of Fluoroquinolone (FQ) contaminants from water. Marbofloxacin (MAR) and Enrofloxacin (ENR) were chosen as model FQs since they are the two most commonly employed veterinary FQs in livestock farming in northern Italy. Adsorption experiments on two sepiolites (SP-1 and SSE16) were carried out in tap water at pH 7.5 to better mimic real conditions. The sorption experimental data were fitted by Freundlich, Langmuir and S-Logistic1 models. The latter better described MAR and ENR adsorptions. Adsorption capacities of SP-1 and SSE16, respectively, were 132 mg g(-1) and 121 mg g(-1) for MAR, and 112 mg g(-1) and 93 mg g(-1) for ENR. X-ray powder diffraction, performed on clay samples enriched with each FQ and on the pristine clays, showed no substantial differences between the two sepiolites and evidenced no significant structural changes after FQs uptake, as also verified by infrared spectroscopy. This indicates that adsorption occurs only on the external surface of the mineral and not in the intracrystalline microporosity, likely due to the interaction between the FQ carboxylic group and the sepiolite surface. For the first time solid-state photodegradation of the adsorbed FQs was investigated for regenerating the sorbent. Results showed that the adsorbed drugs are effectively photodegraded by solar light, thus allowing sepiolite to be reused. The efficiency of this material for remediation of contaminated water was proved on ditch water, collected downstream a swine farm, containing some tens of ng L(-1) of MAR and ENR.
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Affiliation(s)
- Michela Sturini
- Department of Chemistry, University of Pavia, via Taramelli 12, 27100 Pavia, Italy.
| | - Andrea Speltini
- Department of Chemistry, University of Pavia, via Taramelli 12, 27100 Pavia, Italy
| | - Federica Maraschi
- Department of Chemistry, University of Pavia, via Taramelli 12, 27100 Pavia, Italy
| | - Antonella Profumo
- Department of Chemistry, University of Pavia, via Taramelli 12, 27100 Pavia, Italy
| | - Serena Tarantino
- Department of Earth and Environmental Sciences, University of Pavia, via Ferrata 9, 27100 Pavia, Italy
| | - Alessandro F Gualtieri
- Department of Chemical and Earth Sciences, University of Modena and Reggio Emilia, Via Campi 103, 41125 Modena, Italy
| | - Michele Zema
- Department of Earth and Environmental Sciences, University of Pavia, via Ferrata 9, 27100 Pavia, Italy
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12
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Wen ZD, Wu WM, Ren NQ, Gao DW. Synergistic effect using vermiculite as media with a bacterial biofilm of Arthrobacter sp. for biodegradation of di-(2-ethylhexyl) phthalate. JOURNAL OF HAZARDOUS MATERIALS 2016; 304:118-125. [PMID: 26547620 DOI: 10.1016/j.jhazmat.2015.10.060] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Revised: 10/04/2015] [Accepted: 10/25/2015] [Indexed: 06/05/2023]
Abstract
Vermiculite is one of matrix material used for constructed wetland (CW) for the treatment of municipal wastewater. Arthrobacter sp. strain C21 (CGMCC No. 7671), isolated from a constructed wetland receiving municipal wastewater, forms biofilm on the surface of vermiculite. Di-(2-ethylhexyl) phthalate (DEHP), a typical phthalate pollutant in environment, can be degraded by the biofilm of strain C21 formed on vermiculite. Results of laboratory studies indicated that DEHP was removed from aqueous phase via biodegradation, adsorption by vermiculite, and adsorption by biofilm biomass. Synergistic effect of these three reactions enhanced the overall DEHP removal efficiency. During a batch incubation test with vermiculite and the cell suspension, bacterial adhesion to the media surface occurred within 5h and the phthalate esters (PEs) removal was due to both biodegradation and vermiculite adsorption. As the biofilm developed on surface of vermiculite (5-36 h), biodegradation became the predominance for PEs removal. As mature biofilm was formed (36-54 h), the adsorption of PEs by biofilm biomass became a main driving force for the removal of PEs from aqueous phase. The content of extracellular polymers (EPS) of the biofilm and DEHP removal performance showed a significant positive correlation (rp>0.86).
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Affiliation(s)
- Zhi-Dan Wen
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
| | - Wei-Min Wu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; Department of Civil and Environmental Engineering, William and Cloy Codiga Resource Recovery Research Center, Centre for Sustainable Development & Global Competitiveness, Stanford University, Stanford, CA 94305-4020, USA
| | - Nan-Qi Ren
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Da-Wen Gao
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
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Gil A, Elmchaouri A, Mouzdahir YE, Korili S. Removal of Tetrachloroethylene from Aqueous Solutions by Adsorption on Clay Minerals. ADSORPT SCI TECHNOL 2015. [DOI: 10.1260/0263-6174.33.4.355] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Affiliation(s)
- A. Gil
- Department of Applied Chemistry, Arrosadia Campus, Public University of Navarre, E-31006 Pamplona, Spain
| | - A. Elmchaouri
- Laboratoire de Chimie Physique et de Chimie Bioorganique, Faculté des Sciences et Techniques, Université Hassan II Mohammedia, BP 146, 20650 Mohammedia, Morocco
| | - Y. El Mouzdahir
- Laboratoire de Chimie Physique et de Chimie Bioorganique, Faculté des Sciences et Techniques, Université Hassan II Mohammedia, BP 146, 20650 Mohammedia, Morocco
| | - S.A. Korili
- Department of Applied Chemistry, Arrosadia Campus, Public University of Navarre, E-31006 Pamplona, Spain
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Martins DA, Simões M, Melo L. ADSORPTION OF PARAQUAT DICHLORIDE TO KAOLIN PARTICLES AND TO MIXTURES OF KAOLIN AND HEMATITE PARTICLES IN AQUEOUS SUSPENSIONS. ACTA ACUST UNITED AC 2015. [DOI: 10.15544/jws.2015.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Deliberate contamination with pesticides is a potential risk to water security, due to the availability of these contaminants and the fact that they do not need special expertise to handle or apply. Adsorption of the herbicide paraquat from an aqueous solution to suspended particles of kaolin and kaolin/hematite mixture was investigated by kinetic and equilibrium assays, taking into consideration several parameters such as initial pH, sorbent dosage and agitation speed. The results showed that the adsorption process is quite fast, reaching an 18% reduction in paraquat concentration in a very short period of time. The addition of hematite particles to kaolin suspension had no apparent effect on the maximum amount of paraquat adsorbed. Kinetic parameters were determined by fitting the pseudo-second order model to the experimental data (correlation coefficients close to 1). Isotherm studies indicate an inhibitory effect, promoted by hematite particles, that was not detected in the adsorption assays. Equilibrium data was best adjusted using the Langmuir model which yielded higher correlation coefficient values and smaller normalized standard deviations.
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15
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Efficient removal of cesium from aqueous solution with vermiculite of enhanced adsorption property through surface modification by ethylamine. J Colloid Interface Sci 2014; 428:295-301. [DOI: 10.1016/j.jcis.2014.05.001] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Revised: 04/26/2014] [Accepted: 05/01/2014] [Indexed: 11/18/2022]
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Application of electro-Fenton technology to remediation of polluted effluents by self-sustaining process. ScientificWorldJournal 2014; 2014:801870. [PMID: 24723828 PMCID: PMC3958690 DOI: 10.1155/2014/801870] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Accepted: 01/20/2014] [Indexed: 11/21/2022] Open
Abstract
The applicability of electro-Fenton technology to remediation of wastewater contaminated by several organic pollutants such as dyes and polycyclic aromatic hydrocarbons has been evaluated using iron-enriched zeolite as heterogeneous catalyst. The electro-Fenton technology is an advanced oxidation process that is efficient for the degradation of organic pollutants, but it suffers from the high operating costs due to the need for power investment. For this reason, in this study microbial fuel cells (MFCs) were designed in order to supply electricity to electro-Fenton processes and to achieve high treatment efficiency at low cost. Initially, the effect of key parameters on the MFC power generation was evaluated. Afterwards, the degradation of Reactive Black 5 dye and phenanthrene was evaluated in an electro-Fenton reactor, containing iron-enriched zeolite as catalyst, using the electricity supplied by the MFC. Near complete dye decolourization and 78% of phenanthrene degradation were reached after 90 min and 30 h, respectively. Furthermore, preliminary reusability tests of the developed catalyst showed high degradation levels for successive cycles. The results permit concluding that the integrated system is adequate to achieve high treatment efficiency with low electrical consumption.
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Zenasni MA, Meroufel B, Merlin A, George B. Adsorption of Congo Red from Aqueous Solution Using CTAB-Kaolin from Bechar Algeria. ACTA ACUST UNITED AC 2014. [DOI: 10.4236/jsemat.2014.46037] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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18
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Ferreira L, Cobas M, Tavares T, Sanromán MA, Pazos M. Assessment of Arthrobacter viscosus as reactive medium for forming permeable reactive biobarrier applied to PAHs remediation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2013; 20:7348-7354. [PMID: 23640390 DOI: 10.1007/s11356-013-1750-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Accepted: 04/15/2013] [Indexed: 06/02/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are significant environmental contaminants as they are present naturally as well as anthropogenically in soil, air and water. In spite of their low solubility, PAHs are spread to the environment, and they are present in surface water, industrial effluent or groundwater. Amongst all remediation technologies for treating groundwater contaminated with PAHs, the use of a permeable reactive biobarrier (PRBB) appears to be the most cost-effective, energy efficient, and environmentally sound approach. In this technology, the microorganisms are used as reactive medium to degrade or stabilize the contaminants. The main limits of this approach are that the microorganisms or consortium used for forming the PRBB should show adequate characteristics. They must be retained in the barrier-forming biofilm, and they should also have degradative ability for the target pollutants. The aim of the present work is to evaluate the viability of Arthrobacter viscosus as bioreactive medium for forming PRBB. Initially, the ability of A. viscosus to remove PAHs, benzo[a]anthracene 100 μM and phenanthrene 100 μM was evaluated operating in a batch bench-scale bioreactor. In both cases, total benzo[a]anthracene and phenanthrene removals were obtained after 7 and 3 days, respectively. Furthermore, the viability of the microorganisms was evaluated in the presence of chromium in a continuous mode. As a final point, the adhesion of A. viscosus to sepiolite forming a bioreactive material to build PRBB was demonstrated. In view of the attained results, it can be concluded that A. viscosus could be a suitable microorganism to form a bioreactive medium for PAHs remediation.
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Affiliation(s)
- L Ferreira
- Department of Chemical Engineering, University of Vigo, Vigo, 36310, Spain
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Quintelas C, Costa F, Tavares T. Bioremoval of diethylketone by the synergistic combination of microorganisms and clays: uptake, removal and kinetic studies. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2013; 20:1374-1383. [PMID: 22752815 DOI: 10.1007/s11356-012-1055-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2012] [Accepted: 06/22/2012] [Indexed: 06/01/2023]
Abstract
The performance of two bacteria, Arthrobacter viscosus and Streptococcus equisimilis, and the effect of the interaction of these bacteria with four different clays on the retention of diethylketone were investigated in batch experiments. The uptake, the removal percentages and the kinetics of the processes were determined. S. equisimilis, by itself, had the best performance in terms of removal percentage, for all the initial diethylketone concentrations tested: 200, 350 and 700 mg/L. The uptake values are similar for both bacteria. A possible mechanism to explain the removal of diethylketone includes its degradation by bacteria, followed by the adsorption of the intermediates/sub-products by the functional groups present on the cells' surfaces. The assays performed with bacteria and clays indicated that the uptake values are similar despite of the clay used, for the same microorganism and mass of clay, but in general, higher values are reached when S. equisimilis is used, compared to A. viscosus. Kinetic data were described by pseudo-first- and pseudo-second-order models.
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Affiliation(s)
- Cristina Quintelas
- IBB-Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal.
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Meroufel B, Benali O, Benyahia M, Zenasni MA, Merlin A, George B. Removal of Zn (II) from Aqueous Solution onto Kaolin by Batch Design. ACTA ACUST UNITED AC 2013. [DOI: 10.4236/jwarp.2013.57067] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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