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Preference ratios for mercury and other chemical elements in the Madeira River, Brazil

dc.contributor.authorBonotto, Daniel Marcos [UNESP]
dc.contributor.authorda Silveira, E. G.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal de Rondônia (UNIR)
dc.date.accessioned2014-05-20T14:17:11Z
dc.date.available2014-05-20T14:17:11Z
dc.date.issued2003-03-01
dc.description.abstractSamples of water, suspended solids, and bottom sediments from the Madeira River, Rondonia state, Brazil, were physically and chemically analyzed to investigate the actual Hg mobilization in the aquatic environment and compare it with that of other heavy metals and elements in the area. Two dimensionless Hg preference ratios were defined, expressing (1) the ratio of Hg and other elements in the liquid phase divided by the ratio of Hg and other elements in bottom sediments (P(l.phase)) and (2) the ratio of Hg and other elements in the particulate matter divided by the ratio of Hg and other elements in bottom sediments (P(s.solids)). These preference ratios are useful for comparing Hg transport in three different phases (liquid, particulate matter, and bottom sediments). They also were applicable to any analyzed elementin the area studied, because they generated an almost constant value when the maximum calculated was divided by the minimum (P(l.phase) = 2931; P(s.solids) = 84) and because of their sensitivity to the dominance of sorption processes by Fe oxides and hydroxides. Mercury could be transported preferentially to other analyzed elements in the particulate phase only if its concentration reached values at least 10(4)-fold higher than those expected or quantified in the area. (C) 2002 Elsevier B.V. Ltd. All rights reserved.en
dc.description.affiliationUniv Est Paulista Julio de Mesquita FIlho, UNESP, Inst Geociencias & Ciências Exatas, Dept Petrol & Metalogenia, BR-13506900 Rio Claro, SP, Brazil
dc.description.affiliationFundação Univ Fed Rondonia, UNIR, Dept Geog, BR-78900500 Porto Velho, RO, Brazil
dc.description.affiliationUnespUniv Est Paulista Julio de Mesquita FIlho, UNESP, Inst Geociencias & Ciências Exatas, Dept Petrol & Metalogenia, BR-13506900 Rio Claro, SP, Brazil
dc.format.extent911-923
dc.identifierhttp://dx.doi.org/10.1016/S0895-9811(02)00144-X
dc.identifier.citationJournal of South American Earth Sciences. Oxford: Pergamon-Elsevier B.V., v. 15, n. 8, p. 911-923, 2003.
dc.identifier.doi10.1016/S0895-9811(02)00144-X
dc.identifier.issn0895-9811
dc.identifier.lattes7430102726026121
dc.identifier.urihttp://hdl.handle.net/11449/25156
dc.identifier.wosWOS:000183100700007
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofJournal of South American Earth Sciences
dc.relation.ispartofjcr1.639
dc.relation.ispartofsjr0,829
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectmercurypt
dc.subjectwaterpt
dc.subjectsedimentspt
dc.subjectchemical elementspt
dc.subjectmobilizationpt
dc.titlePreference ratios for mercury and other chemical elements in the Madeira River, Brazilen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
dspace.entity.typePublication
unesp.author.lattes7430102726026121
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Geociências e Ciências Exatas, Rio Claropt
unesp.departmentPetrologia e Metalogenia - IGCEpt

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