Geochemical fractionation of metals and semimetals in surface sediments from tropical impacted estuary (Guanabara Bay, Brazil)
作者： R. C. Cordeiro , W. Machado , R. E. Santelli , A. G. Figueiredo , J. C. S. Seoane
DOI: 10.1007/S12665-015-4127-Y
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摘要: A three-step sequential extraction procedure, which was based on the BCR method, used to analyse Guanabara Bay sediment samples evaluate potential mobility of some metals and metalloids. Zn Cd were found be most labile because these recovered in first stage associated with non-residual fraction sediment. In contrast, Cr, Cu, Ni, Hg least metals, 62 84 % concentrations organic residual samples. The spatial distribution metal led identification various sources contamination. continental sources, related Fe Al, distributed northern central sectors, although lower mouths rivers that flow into estuarine system Bay. urban emission are discharges Sao Joao de Meriti River, exhibit significant levels Ba, Cd, Zn, Hg. River harbour activities also show a predominance Pb Cu. formed by Iguacu Sarapui is mainly characterised V Cr. biogeochemical processes, such as As Mn, sector
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