Combined SEM/AVS and attenuation of concentration models for the assessment of bioavailability and mobility of metals in sediments of Sepetiba Bay (SE Brazil)

摘要: This study proposes a new methodology to contamination, bioavailability and mobility of metals (Cd, Cu, Ni, Pb, Zn) using chemical geostatistics approaches in marine sediments Sepetiba Bay (SE Brazil). The model SEM (simultaneously extracted metals)/AVS (acid volatile sulfides) ratio uses technique cold acid extraction evaluate their bioavailability, the geostatistical attenuation concentrations estimates metals. By coupling two it was observed that Port, urban area riverine discharges may constitute potential sources Bay. are concentrated NE bay, where they tend have lowest mobility, as shown by model, not bioavailable, associate with sulfide organic matter originated mangrove forests nearby Guaratiba area.