Novel chitosan goethite bionanocomposite beads for arsenic remediation.
Identifieur interne : 001A34 ( Main/Exploration ); précédent : 001A33; suivant : 001A35Novel chitosan goethite bionanocomposite beads for arsenic remediation.
Auteurs : Jing He [France] ; Fabrizio Bardelli [France] ; Antoine Gehin [France] ; Ewen Silvester [Australie] ; Laurent Charlet [France]Source :
- Water research [ 1879-2448 ] ; 2016.
Descripteurs français
- KwdFr :
- MESH :
English descriptors
- KwdEn :
- MESH :
- chemical , chemistry : Arsenic, Chitosan, Water Pollutants, Chemical.
- Adsorption, Hydrogen-Ion Concentration, Kinetics, Water Purification.
Abstract
We report on the synthesis and As adsorption properties of a novel chitosan - iron (oxyhydr)oxide composite material for the remediation of arsenic-contaminated water supplies. FE-SEM, Mössbauer spectroscopy, ICP-OES and synchrotron (Bulk XAS, μXRF) techniques were applied to determine the composition of the new material and investigate the As uptake efficiency and mechanism. The iron (oxyhydr)oxide phase has been identified as a nano-sized goethite, well dispersed in the chitosan matrix, leading to the name 'chitosan goethite bionanocomposite' (CGB). The CGB material is prepared in the form of beads of high density and excellent compression strength; the embedding of the goethite nanoparticles in the chitosan matrix allows for the high adsorption capacity of nanoparticles to be realized. CGB beads remove both As(III) and As(V) efficiently from water, over the pH range 5-9, negating the need for pre-oxidation of As(III). Kinetic studies and μXRF analysis of CGB bead sections show that diffusion-adsorption of As(V) into CGB beads is faster than for As(III). Using CGB beads, synthetic high-arsenic water (0.5 mg-As/L) could be purified to world drinking standard level (<0.01 mg-As/L) using only 1.4 g/L CGB. When considered in combination with the advantages of the low-cost of raw materials required, and facile (green) synthesis route, CGB is a promising material for arsenic remediation, particularly in developing countries, which suffer a diversity of socio-economical-traditional constraints for water purification and sanitation.
DOI: 10.1016/j.watres.2016.05.032
PubMed: 27240296
Affiliations:
- Australie, France
- Auvergne-Rhône-Alpes, Rhône-Alpes, Île-de-France
- Grenoble, Paris
- Université Grenoble-Alpes
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Le document en format XML
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Box 53, F 38041 Grenoble, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>School of Resource and Environmental Science, Wuhan University, 129 Luoyu Road, Wuhan 430079, PR China; ISTerre, Université Grenoble Alpes, P.O. Box 53, F 38041 Grenoble</wicri:regionArea><placeName><region type="region" nuts="2">Auvergne-Rhône-Alpes</region><region type="old region" nuts="2">Rhône-Alpes</region><settlement type="city">Grenoble</settlement></placeName></affiliation></author><author><name sortKey="Bardelli, Fabrizio" sort="Bardelli, Fabrizio" uniqKey="Bardelli F" first="Fabrizio" last="Bardelli">Fabrizio Bardelli</name><affiliation wicri:level="4"><nlm:affiliation>ISTerre, Université Grenoble Alpes, P.O. Box 53, F 38041 Grenoble, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>ISTerre, Université Grenoble Alpes, P.O. 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Box 53, F 38041 Grenoble, France; Institut Universitaire de France, 103, bd Saint-Michel, 75005 Paris</wicri:regionArea><wicri:noRegion>75005 Paris</wicri:noRegion><placeName><settlement type="city">Paris</settlement><region type="région" nuts="2">Île-de-France</region><settlement type="city">Grenoble</settlement></placeName><orgName type="university">Université Grenoble-Alpes</orgName></affiliation></author></analytic><series><title level="j">Water research</title><idno type="eISSN">1879-2448</idno><imprint><date when="2016" type="published">2016</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Adsorption</term><term>Arsenic (chemistry)</term><term>Chitosan (chemistry)</term><term>Hydrogen-Ion Concentration</term><term>Kinetics</term><term>Water Pollutants, Chemical (chemistry)</term><term>Water Purification</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Adsorption</term><term>Arsenic ()</term><term>Chitosane ()</term><term>Cinétique</term><term>Concentration en ions d'hydrogène</term><term>Polluants chimiques de l'eau ()</term><term>Purification de l'eau</term></keywords><keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Arsenic</term><term>Chitosan</term><term>Water Pollutants, Chemical</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Adsorption</term><term>Hydrogen-Ion Concentration</term><term>Kinetics</term><term>Water Purification</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Adsorption</term><term>Arsenic</term><term>Chitosane</term><term>Cinétique</term><term>Concentration en ions d'hydrogène</term><term>Polluants chimiques de l'eau</term><term>Purification de l'eau</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">We report on the synthesis and As adsorption properties of a novel chitosan - iron (oxyhydr)oxide composite material for the remediation of arsenic-contaminated water supplies. FE-SEM, Mössbauer spectroscopy, ICP-OES and synchrotron (Bulk XAS, μXRF) techniques were applied to determine the composition of the new material and investigate the As uptake efficiency and mechanism. The iron (oxyhydr)oxide phase has been identified as a nano-sized goethite, well dispersed in the chitosan matrix, leading to the name 'chitosan goethite bionanocomposite' (CGB). The CGB material is prepared in the form of beads of high density and excellent compression strength; the embedding of the goethite nanoparticles in the chitosan matrix allows for the high adsorption capacity of nanoparticles to be realized. CGB beads remove both As(III) and As(V) efficiently from water, over the pH range 5-9, negating the need for pre-oxidation of As(III). Kinetic studies and μXRF analysis of CGB bead sections show that diffusion-adsorption of As(V) into CGB beads is faster than for As(III). Using CGB beads, synthetic high-arsenic water (0.5 mg-As/L) could be purified to world drinking standard level (<0.01 mg-As/L) using only 1.4 g/L CGB. When considered in combination with the advantages of the low-cost of raw materials required, and facile (green) synthesis route, CGB is a promising material for arsenic remediation, particularly in developing countries, which suffer a diversity of socio-economical-traditional constraints for water purification and sanitation.</div></front></TEI><affiliations><list><country><li>Australie</li><li>France</li></country><region><li>Auvergne-Rhône-Alpes</li><li>Rhône-Alpes</li><li>Île-de-France</li></region><settlement><li>Grenoble</li><li>Paris</li></settlement><orgName><li>Université Grenoble-Alpes</li></orgName></list><tree><country name="France"><region name="Auvergne-Rhône-Alpes"><name sortKey="He, Jing" sort="He, Jing" uniqKey="He J" first="Jing" last="He">Jing He</name></region><name sortKey="Bardelli, Fabrizio" sort="Bardelli, Fabrizio" uniqKey="Bardelli F" first="Fabrizio" last="Bardelli">Fabrizio Bardelli</name><name sortKey="Charlet, Laurent" sort="Charlet, Laurent" uniqKey="Charlet L" first="Laurent" last="Charlet">Laurent Charlet</name><name sortKey="Gehin, Antoine" sort="Gehin, Antoine" uniqKey="Gehin A" first="Antoine" last="Gehin">Antoine Gehin</name></country><country name="Australie"><noRegion><name sortKey="Silvester, Ewen" sort="Silvester, Ewen" uniqKey="Silvester E" first="Ewen" last="Silvester">Ewen Silvester</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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