LEAD DISTRIBUTION AND ISOTOPE SIGNATURE IN BOTTOM SEDIMENTS OF GUAMA RIVER AND GUAJARA BAY (BELEM - PARA)
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
13/09/2013
13/09/2013
01/09/2012
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Resumo |
LEAD DISTRIBUTION AND ISOTOPE SIGNATURE IN BOTTOM SEDIMENTS OF GUAMA RIVER AND GUAJARA BAY (BELEM - PARA). Lead analyses in bottom sediments from the hydrographic system of Belem (Para) indicated low contents of this metal for the sediments from the Guama river, with no significant anthropogenic contribution. A concentration of 18.1 +/- 1.5 mg kg(-1) and Pb-206/Pb-207 isotopic signature of 1.196 +/- 0.002 are assigned for Pb from natural sources. On the other hand, the significant increase of Pb contents in the sediments from the Guajara bay, together with the decrease of Pb-206/Pb-207 ratios (1.172 < Pb-206/Pb-207 < 1.188) point to an anthropogenic lead contribution, originated by the industrial and urban activities of the city of Belem. |
Identificador |
QUIMICA NOVA, SAO PAULO, v. 35, n. 2, pp. 249-256, SEP 1, 2012 0100-4042 http://www.producao.usp.br/handle/BDPI/33358 10.1590/S0100-40422012000200004 |
Idioma(s) |
por |
Publicador |
SOC BRASILEIRA QUIMICA SAO PAULO |
Relação |
QUIMICA NOVA |
Direitos |
openAccess Copyright SOC BRASILEIRA QUIMICA |
Palavras-Chave | #BOTTOM SEDIMENTS #PB ISOTOPES #BELEM - PA #LAKE-SEDIMENTS #CHEMISTRY, MULTIDISCIPLINARY |
Tipo |
article original article publishedVersion |