Cylindrospermopsis raciborskii (Cyanobacteria) exudates: Chemical characterization and complexation capacity for Cu, Zn, Cd and Pb

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dc.contributor.authorTonietto, Alessandra Emanuele
dc.contributor.authorLombardi, Ana Teresa
dc.contributor.authorHenriques Vieira, Armando Augusto
dc.contributor.authorParrish, Christopher C.
dc.contributor.authorChoueri, Rodrigo Brasil [UNIFESP]
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionMem Univ Newfoundland
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.contributor.institutionUniv Santa Cecilia
dc.date.accessioned2016-01-24T14:35:15Z
dc.date.available2016-01-24T14:35:15Z
dc.date.issued2014-02-01
dc.description.abstractCylindrospermopsis raciborskii is a cosmopolitan and potentially toxic planktonic Cyanobacteria that produces and exudes copious amounts of dissolved organic materials. This organism dominates the eutrophic reservoir Barra Bonita (Brazil), where it normally blooms throughout the year. This investigation focused on the characterization of such exudates analyzing their capacity to complex copper, zinc, lead and cadmium through the determination of ligand concentration (C-L) and conditional stability constant (logK'mL), as well as elemental composition (C, H, N and S), the content of carbohydrates, proteins, lipids and dissolved organic carbon (DOC). the dissolved organic material was fractionated into 3 molecular weights (>30 kDa; 30-10 kDa; 10-3 kDa) and each fraction was analyzed. the results showed that in the >30 kDa and 30-10 kDa fractions carbohydrates dominate over proteins and lipids. Different CL and logK'mL were obtained for the different molecular weight fractions of the excreted organic materials, suggesting high diversity of ligands. in the >30 kDa, there were more complexing sites (CL) for Cu, but higher affinity (K') for Zn. in the 30-10 kDa fraction, the higher C-L was for Cd, but the greatest affinities were for Cu and Zn. in the 10-3 kDa fraction, higher C-L was obtained for Cd and Zn, while Cu and Cd had the highest strengths of association. in the environment, such diversity of ligands and strengths of association can result in a displacement of metals weakly bound to the EOM, and increase metal buffering capacity of the environment, supporting higher metal inputs before toxic effects are detected in the biota. (C) 2013 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniv Fed Sao Carlos, Dept Chem, BR-13565905 Sao Carlos, SP, Brazil
dc.description.affiliationUniv Fed Sao Carlos, Dept Bot, BR-13565905 Sao Carlos, SP, Brazil
dc.description.affiliationMem Univ Newfoundland, Dept Ocean Sci, St John, NF, Canada
dc.description.affiliationUniversidade Federal de São Paulo, BR-11060001 São Paulo, Brazil
dc.description.affiliationUniv Santa Cecilia, Dept Ecotoxicol, BR-11045907 São Paulo, Brazil
dc.description.affiliationUnifespUniversidade Federal de São Paulo, BR-11060001 São Paulo, Brazil
dc.description.sourceWeb of Science
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.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipIDFAPESP: 2005/51263-5
dc.description.sponsorshipIDCNPq: 302837/20124
dc.format.extent381-390
dc.identifierhttp://dx.doi.org/10.1016/j.watres.2013.10.025
dc.identifier.citationWater Research. Oxford: Pergamon-Elsevier B.V., v. 49, p. 381-390, 2014.
dc.identifier.doi10.1016/j.watres.2013.10.025
dc.identifier.issn0043-1354
dc.identifier.urihttp://repositorio.unifesp.br/handle/11600/37394
dc.identifier.wosWOS:000330601400034
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofWater Research
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.rights.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.subjectExudatesen
dc.subjectComplexation capacityen
dc.subjectHeavy metalen
dc.subjectCylindrospermopsis raciborskiien
dc.subjectCyanobacteriaen
dc.titleCylindrospermopsis raciborskii (Cyanobacteria) exudates: Chemical characterization and complexation capacity for Cu, Zn, Cd and Pben
dc.typeinfo:eu-repo/semantics/article
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