ELIZABETH SONODA KEIKO DANTAS

ELIZABETH SONODA KEIKO DANTAS

(Fonte: Lattes)

Resumo

Possui mestrado em Química pelo Instituto de Pesquisas Energéticas e Nucleares (1990) e doutorado em Química (Química Analítica) [Sp-Capital] pela Universidade de São Paulo (1999). Atualmente é pesquisador adjunto do Instituto de Pesquisas Energéticas e Nucleares. Tem experiência na área de Química, com ênfase em Análise de Traços e Química Ambiental, atuando principalmente nos seguintes temas: absorção atômica, cromatografia de íons, metais, especiação. (Texto extraído do Currículo Lattes em 04 maio 2023)

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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.