JULIO CESAR WASSERMAN
6 resultados
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Artigo IPEN-doc 09390 A preliminary study on the behaviour of trace elements in sediment cores from Ilha Grande (Rio de Janeiro) by neutron activation analysis2002 - WASSERMAN, J.C.; FIGUEIREDO, A.M.G.; FIGUEIRA, A.L.; KELECOM, A.Artigo IPEN-doc 06463 Geochemical characterization of rain water particulate material on a coastal sub-tropical region in SE-Brazil1998 - SILVA FILHO, E.V.; PAIVA, R.P.; WASSERMAN, J.C.; LACERDA, L.D.Artigo IPEN-doc 07040 Elemental composition of sediment cores from a mangrove environment using neutron activation analysis2001 - WASSERMAN, J.C.; FIGUEIREDO, A.M.G.; PELLEGATTI, F.; SILVA FILHO, E.V.Artigo IPEN-doc 07646 Neutron activation analysis applied to the determination of heavy metals and other trace elements in sediments from Sepetiba Bay (RJ), Brazil2001 - PELLEGATTI, F.; FIGUEIREDO, A.M.G.; 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.