Title of article :
Combined SEM/AVS and attenuation of concentration models for the assessment of bioavailability and mobility of metals in sediments of Sepetiba Bay (SE Brazil)
Author/Authors :
Ribeiro، نويسنده , , Andreza Portella and Figueiredo، نويسنده , , Ana Maria Graciano and Santos، نويسنده , , José Osman dos and Dantas، نويسنده , , Elizabeth and Cotrim، نويسنده , , Marycel Elena Barboza and Cesar Lopes Figueira، نويسنده , , Rubens and V. Silva Filho، نويسنده , , Emmanoel and Cesar Wasserman، نويسنده , , Julio، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2013
Pages :
9
From page :
55
To page :
63
Abstract :
This study proposes a new methodology to study contamination, bioavailability and mobility of metals (Cd, Cu, Ni, Pb, and Zn) using chemical and geostatistics approaches in marine sediments of Sepetiba Bay (SE Brazil). The chemical model of SEM (simultaneously extracted metals)/AVS (acid volatile sulfides) ratio uses a technique of cold acid extraction of metals to evaluate their bioavailability, and the geostatistical model of attenuation of concentrations estimates the mobility of metals. By coupling the two it was observed that Sepetiba Port, the urban area of Sepetiba and the riverine discharges may constitute potential sources of metals to Sepetiba Bay. The metals are concentrated in the NE area of the bay, where they tend to have their lowest mobility, as shown by the attenuation model, and are not bioavailable, as they tend to associate with sulfide and organic matter originated in the mangrove forests of nearby Guaratiba area.
Keywords :
Metals , Bioavailability , Mobility , Attenuation , SEM/AVS , Sepetiba bay
Journal title :
Marine Pollution Bulletin
Serial Year :
2013
Journal title :
Marine Pollution Bulletin
Record number :
1987532
Link To Document :
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