JULIO CESAR WASSERMAN
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Resumo IPEN-doc 18640 Model of spatial distribution of sup(40)K and sup(137)Cs in marine sediments of the Southeastern Brazilian upper margin2012 - RIBEIRO, A.P.; FIGUEIREDO, A.M.G.; FIGUEIRA, R.C.L.; OSMAN, J.O.; WASSERMAN, J.C.Resumo IPEN-doc 18641 Acid volatile sulphide (AVS) and simultaneously extracted metals (SEM) procedure compared to attenuation model to assess heavy metal mobility in sediments from Sepetiba Bay, Rio de Janeio, Brazil2012 - RIBEIRO, A.P.; FIGUEIREDO, A.M.G.; FIGUEIRA, R.C.L.; OSMAN, J.O.; WASSERMAN, J.C.Artigo IPEN-doc 17262 Origin of rare earth element anomalies in mangrove sediments, Sepetiba Bay, SE, Brazil: used as geochemical tracers of sediment sources2011 - SILVA FILHO, EMMANOEL V.; SANDERS, CHRISTIAN J.; BERNAT, MICHEL; FIGUEIREDO, ANA M.G.; SELLA, SILVIA M.; WASSERMAN, JULIOArtigo IPEN-doc 19042 Combined SEM/AVS and attenuation of concentration models for the assessment of biovailability and modified of metals in sediments of Septiba Bay (SE Brazil)2013 - RIBEIRO, ANDREZA P.; FIGUEIREDO, ANA M.G.; SANTOS, JOSE O. dos; DANTAS, ELIZABETH; COTRIM, MARYCEL E.B.; FIGUEIRA, RUBENS C.L.; SILVA FILHO, EMMANOEL V.; WASSERMAN, JULIO C.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.