Removal of glyphosate herbicide from water using biopolymer membranes

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dc.contributor.authorCarneiro, Rafael T. A.
dc.contributor.authorTaketa, Thiago B.
dc.contributor.authorGomes Neto, Reginaldo J.
dc.contributor.authorOliveira, Jhones L.
dc.contributor.authorCampos, Estefania V. R.
dc.contributor.authorMoraes, Mariana A. de [UNIFESP]
dc.contributor.authorSilva, Camila M. G. da
dc.contributor.authorBeppu, Marisa M.
dc.contributor.authorFraceto, Leonardo F.
dc.contributor.institutionUniv Estadual Paulista
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.date.accessioned2016-01-24T14:40:14Z
dc.date.available2016-01-24T14:40:14Z
dc.date.issued2015-03-15
dc.description.abstractEnormous amounts of pesticides are manufactured and used worldwide, some of which reach soils and aquatic systems. Glyphosate is a non-selective herbicide that is effective against all types of weeds and has been used for many years. It can therefore be found as a contaminant in water, and procedures are required for its removal. This work investigates the use of biopolymeric membranes prepared with chitosan (CS), alginate (AG), and a chitosan/alginate combination (CS/AG) for the adsorption of glyphosate present in water samples. the adsorption of glyphosate by the different membranes was investigated using the pseudo-first order and pseudo-second order kinetic models, as well as the Langmuir and Freundlich isotherm models. the membranes were characterized regarding membrane solubility, swelling, mechanical, chemical and morphological properties. the results of kinetics experiments showed that adsorption equilibrium was reached within 4 h and that the CS membrane presented the best adsorption (10.88 mg of glyphosate/g of membrane), followed by the CS/AG bilayer (8.70 mg of glyphosate/g of membrane). the AG membrane did not show any adsorption capacity for this herbicide. the pseudo-second order model provided good fits to the glyphosate adsorption data on CS and CS/AG membranes, with high correlation coefficient values. Glyphosate adsorption by the membranes could be fitted by the Freundlich isotherm model. There was a high affinity between glyphosate and the CS membrane and moderate affinity in the case of the CS/AG membrane. Physico-chemical characterization of the membranes showed low values of solubility in water, indicating that the membranes are stable and not soluble in water. the SEM and AFM analysis showed evidence of the presence of glyphosate on CS membranes and on chitosan face on CS/AG membranes. the results showed that the glyphosate herbicide can be adsorbed by chitosan membranes and the proposed membrane-based methodology was successfully used to treat a water sample contaminated with glyphosate. Biopolymer membranes therefore potentially offer a versatile method to eliminate agricultural chemicals from water supplies. (C) 2015 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniv Estadual Paulista, Dept Engn Ambiental, UNESP, BR-18087180 Sorocaba, SP, Brazil
dc.description.affiliationUniv Estadual Campinas, UNICAMP, Fac Engn Quim, Dept Engn Mat & Bioproc, Campinas, SP, Brazil
dc.description.affiliationUniv Estadual Campinas, Inst Biol, Dept Bioquim, UNICAMP, Campinas, SP, Brazil
dc.description.affiliationUniversidade Federal de São Paulo UNIFESP, Dept Ciencias Exatas & Terra, Diadema, SP, Brazil
dc.description.affiliationUnifespUniversidade Federal de São Paulo UNIFESP, Dept Ciencias Exatas & Terra, Diadema, SP, Brazil
dc.description.sourceWeb of Science
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipFundação para o Desenvolvimento da UNESP (FUNDUNESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIDFAPESP: 2013/05135-1
dc.format.extent353-360
dc.identifierhttp://dx.doi.org/10.1016/j.jenvman.2015.01.005
dc.identifier.citationJournal of Environmental Management. London: Academic Press Ltd- Elsevier B.V., v. 151, p. 353-360, 2015.
dc.identifier.doi10.1016/j.jenvman.2015.01.005
dc.identifier.issn0301-4797
dc.identifier.urihttp://repositorio.unifesp.br/handle/11600/38888
dc.identifier.wosWOS:000350087900036
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofJournal of Environmental Management
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.rights.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.subjectWater contaminationen
dc.subjectSorptionen
dc.subjectMembranesen
dc.subjectGlyphosateen
dc.subjectChitosanen
dc.subjectAlginateen
dc.titleRemoval of glyphosate herbicide from water using biopolymer membranesen
dc.typeinfo:eu-repo/semantics/article
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