Paraquat-loaded alginate/chitosan nanoparticles: Preparation, characterization and soil sorption studies

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dc.contributor.authorSilva, Mariana dos Santos [UNESP]
dc.contributor.authorCocenza, Daniela Sgarbi [UNESP]
dc.contributor.authorGrillo, Renato [UNESP]
dc.contributor.authorSilva de Melo, Nathalie Ferreira [UNESP]
dc.contributor.authorTonello, Paulo Sergio [UNESP]
dc.contributor.authorde Oliveira, Luciana Camargo
dc.contributor.authorCassimiro, Douglas Lopes [UNESP]
dc.contributor.authorRosa, Andre Henrique [UNESP]
dc.contributor.authorFraceto, Leonardo Fernandes [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.date.accessioned2014-05-20T13:12:13Z
dc.date.available2014-05-20T13:12:13Z
dc.date.issued2011-06-15
dc.description.abstractAgrochemicals are amongst the contaminants most widely encountered in surface and subterranean hydrological systems. They comprise a variety of molecules, with properties that confer differing degrees of persistence and mobility in the environment, as well as different toxic, carcinogenic, mutagenic and teratogenic potentials, which can affect non-target organisms including man. In this work, alginate/chitosan nanoparticles were prepared as a carrier system for the herbicide paraquat. The preparation and physicochemical characterization of the nanoparticles was followed by evaluation of zeta potential, pH, size and polydispersion. The techniques employed included transmission electron microscopy, differential scanning calorimetry and Fourier transform infrared spectroscopy. The formulation presented a size distribution of 635 +/- 12 nm, polydispersion of 0.518, zeta potential of -22.8 +/- 2.3 mV and association efficiency of 74.2%. There were significant differences between the release profiles of free paraquat and the herbicide associated with the alginate/chitosan nanoparticles. Tests showed that soil sorption of paraquat, either free or associated with the nanoparticles. was dependent on the quantity of organic matter present. The results presented in this work show that association of paraquat with alginate/chitosan nanoparticles alters the release profile of the herbicide, as well as its interaction with the soil, indicating that this system could be an effective means of reducing negative impacts caused by paraquat. (C) 2011 Elsevier B.V. All rights reserved.en
dc.description.affiliationSo Paulo State Univ UNESP, Dept Environm Engn, BR-18087180 Sorocaba, SP, Brazil
dc.description.affiliationState Univ Campinas UNICAMP, Inst Biol, Dept Biochem, Campinas, SP, Brazil
dc.description.affiliationUniversidade Federal de São Carlos (UFSCar), Dept Chem, São Carlos, SP, Brazil
dc.description.affiliationSão Paulo State Univ UNESP, Inst Chem, Araraquara, SP, Brazil
dc.description.affiliationUnespSo Paulo State Univ UNESP, Dept Environm Engn, BR-18087180 Sorocaba, SP, Brazil
dc.description.affiliationUnespSão Paulo State Univ UNESP, Inst Chem, Araraquara, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação para o Desenvolvimento da UNESP (FUNDUNESP)
dc.format.extent366-374
dc.identifierhttp://dx.doi.org/10.1016/j.jhazmat.2011.03.057
dc.identifier.citationJournal of Hazardous Materials. Amsterdam: Elsevier B.V., v. 190, n. 1-3, p. 366-374, 2011.
dc.identifier.doi10.1016/j.jhazmat.2011.03.057
dc.identifier.issn0304-3894
dc.identifier.lattes6348835539744984
dc.identifier.lattes2188736885721242
dc.identifier.orcid0000-0002-2042-018X
dc.identifier.orcid0000-0003-2774-9727
dc.identifier.orcid0000-0002-0284-5782
dc.identifier.urihttp://hdl.handle.net/11449/205
dc.identifier.wosWOS:000292427800046
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofJournal of Hazardous Materials
dc.relation.ispartofjcr6.434
dc.relation.ispartofsjr1,787
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectParaquaten
dc.subjectNanoparticlesen
dc.subjectAlginateen
dc.subjectChitosanen
dc.titleParaquat-loaded alginate/chitosan nanoparticles: Preparation, characterization and soil sorption studiesen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes6348835539744984[5]
unesp.author.lattes5228846314663888[8]
unesp.author.lattes2188736885721242[3]
unesp.author.orcid0000-0002-2042-018X[8]
unesp.author.orcid0000-0003-2774-9727[5]
unesp.author.orcid0000-0002-0284-5782[3]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Ciência e Tecnologia, Sorocabapt

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Artigos - Engenharia Ambiental - Sorocaba