Pb isotope signatures of sediments from Guanabara Bay, SE Brazil: Evidence for multiple anthropogenic sources期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Pb isotope signatures of sediments from Guanabara Bay, SE Brazil: Evidence for multiple anthropogenic sources

Authors:	MC Geraldes AH Paula JM Godoy CM Valeriano

Institution:	^aLAGIR—Laboratório de Geocronologia de Isótopos Radiogênicos, Faculdade de Geocronologia, Universidade do Estado do Rio de Janeiro (UERJ), Rua São Francisco Xavier 524, 20559-900 Rio de Janeiro-RJ, Brazil;^bDepartamento de Química, Pontifícia Universidade Católica-RJ (PUC-Rio), Rua Marquês de São Vicente 225, 22453-900, Rio de Janeiro-RJ, Brazil

Abstract:	Sediments from Guanabara Bay and two rivers were analyzed for Pb isotope composition. The results define linear groups interpreted as different sources of Pb. The samples from Iriri and Surui rivers present different Pb compositions probably resulting from two active pollutants which are transported in the waters to the Guanabara Bay, where they are mixed. The ²⁰⁶Pb/²⁰⁷Pb values of 1.151 and 1.091 presented here are in the range of Brazilian galena ore signature.

Keywords:	Pb isotopes Sediments Guanabara Bay
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