Variabilidade espacial e sazonal da concentração de elementos-traço em sedimentos do sistema estuarino de Santos-Cubatão (SP)

Spatial and seasonal variability of trace-element concentrations in sediments from the Santos-Cubatão estuarine system, São Paulo, Brazil

dc.creatorLuiz-Silva, Wanilson
dc.creatorMatos, Rosa Helena Ribeiro
dc.creatorKristosch, Giane Chaves
dc.creatorMachado, Wilson
dc.date2006-04-01
dc.date2015-12-03T13:30:30Z
dc.date2015-12-03T13:30:30Z
dc.date.accessioned2018-03-29T01:24:36Z
dc.date.available2018-03-29T01:24:36Z
dc.identifierQuímica Nova. Sociedade Brasileira de Química, v. 29, n. 2, p. 256-263, 2006.
dc.identifier0100-4042
dc.identifierS0100-40422006000200016
dc.identifier10.1590/S0100-40422006000200016
dc.identifierhttp://dx.doi.org/10.1590/S0100-40422006000200016
dc.identifierhttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422006000200016
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/23710
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/202405
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1302638
dc.descriptionMulti-element analyses of sediment samples from the Santos-Cubatão Estuarine System were carried out to investigate the spatial and seasonal variability of trace-element concentrations. The study area contains a rich mangrove ecosystem that is a habitat for tens of thousands of resident and migratory birds, some of them endangered globally. Enrichments of metals in fine-grained surface sediments are, in decreasing order, Hg, Mn, La, Ca, Sr, Cd, Zn, Pb, Ba, Cu, Cr, Fe, Nb, Y, Ni and Ga, relative to pre-industrial background levels. The maximum enrichment ranged from 49 (Hg) to 3.1 (Ga). Mercury concentrations were greater in the Cubatão river than in other sites, while the other elements showed greater concentrations in the Morrão river. Concentrations of Mn were significantly greater in winter and autumn than in summer and spring. However, other elements (e.g. Cd and Pb) showed the opposite, with greater concentrations in summer and spring. This study suggests that seasonal changes in physical and chemical conditions may affect the degree of sediment enrichment and therefore make the assessment of contamination difficult. Consequently, these processes need to be considered when assessing water quality and the potential contamination of biota.
dc.description256
dc.description263
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.languagept
dc.publisherSociedade Brasileira de Química
dc.relationQuímica Nova
dc.rightsaberto
dc.sourceSciELO
dc.subjectheavy metals
dc.subjectsediment geochemistry
dc.subjectcontamination
dc.titleVariabilidade espacial e sazonal da concentração de elementos-traço em sedimentos do sistema estuarino de Santos-Cubatão (SP)
dc.titleSpatial and seasonal variability of trace-element concentrations in sediments from the Santos-Cubatão estuarine system, São Paulo, Brazil
dc.typeArtículos de revistas


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