The influence of seasonalness on the structural characteristics of aquatic humic substances extracted from Negro River (Amazon state) waters: Interactions with Hg(II)

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dc.contributor.authorDe Oliveira, Luciana C. [UNESP]
dc.contributor.authorSargentini Jr., Ézio
dc.contributor.authorRosa, André H. [UNESP]
dc.contributor.authorRocha, Julio C. [UNESP]
dc.contributor.authorSimões, Marcelo L.
dc.contributor.authorMartin-Neto, Ladislau
dc.contributor.authorDa Silva, Wilson T. L.
dc.contributor.authorSerudo, Ricardo L.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionInstituto Nacional de Pesquisas da Amazônia (INPA)
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.date.accessioned2014-05-27T11:22:35Z
dc.date.available2014-05-27T11:22:35Z
dc.date.issued2007-09-06
dc.description.abstractIn this work, humic substances were extracted from water samples collected monthly from the Negro River basin in the Amazon state (Brazil) to study their properties in the Amazonian environment and interactions with the mercury ion considering the influence of seasonalness in this formation. The C/H, C/N and C/O atomic ratio parameters, functional groups, concentration of semiquinone-type free radicals, pH, pluviometric and fluviometric indices, and mercury concentrations were interpreted using hierarchical cluster analysis (HCA) and principal component analysis (PCA). The statistical analyses showed that when the pluviometric index was greater and the fluviometric index was smaller, the degree of humification of aquatic substances was greater. The following decreasing order of the degree of humification of the AHS collected monthly was established: Nov/02 to Feb/03 > Mar/02 to May/02 > Jun/02 to Oct/02. The greatest concentrations of mercury were detected in more humidified samples. These results suggest that due to inter and/or intra-molecular rearrangements, the degree of humification of aquatic humic substances is related to its affinity for Hg(II) ions. ©2007 Sociedade Brasileira de Química.en
dc.description.affiliationInstituto de Química Universidade Estadual Paulista, CP 355, 14800-900 Araraquara-SP
dc.description.affiliationInstituto Nacional de Pesquisas da Amazônia-INPA, Manaus-AM
dc.description.affiliationDepartamento de Engenharia Ambiental Universidade Estadual Paulista, 18087-180 Sorocaba-SP
dc.description.affiliationEmbrapa Instrumentação Agropecuária, 13560-970 São Carlos-SP
dc.description.affiliationUnespInstituto de Química Universidade Estadual Paulista, CP 355, 14800-900 Araraquara-SP
dc.description.affiliationUnespDepartamento de Engenharia Ambiental Universidade Estadual Paulista, 18087-180 Sorocaba-SP
dc.format.extent860-868
dc.identifierhttp://dx.doi.org/10.1590/S0103-50532007000400028
dc.identifier.citationJournal of the Brazilian Chemical Society, v. 18, n. 4, p. 860-868, 2007.
dc.identifier.doi10.1590/S0103-50532007000400028
dc.identifier.file2-s2.0-34548311554.pdf
dc.identifier.issn0103-5053
dc.identifier.issn1678-4790
dc.identifier.orcid0000-0002-2042-018X
dc.identifier.scieloS0103-50532007000400028
dc.identifier.scopus2-s2.0-34548311554
dc.identifier.urihttp://hdl.handle.net/11449/69882
dc.identifier.wosWOS:000249204300028
dc.language.isoeng
dc.relation.ispartofJournal of the Brazilian Chemical Society
dc.relation.ispartofjcr1.444
dc.relation.ispartofsjr0,357
dc.relation.ispartofsjr0,357
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectAmazon
dc.subjectAquatic humic substance
dc.subjectMercury
dc.subjectNegro River
dc.subjectSeasonality
dc.titleThe influence of seasonalness on the structural characteristics of aquatic humic substances extracted from Negro River (Amazon state) waters: Interactions with Hg(II)en
dc.typeArtigo
dcterms.licensehttp://www.scielo.br/revistas/jbchs/iaboutj.htm
unesp.author.lattes5228846314663888[3]
unesp.author.orcid0000-0002-2042-018X[3]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Ciência e Tecnologia, Sorocabapt

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