Concentrations and History of Heavy Metals in Sediment Cores: Geochemistry and Geochronology Using 210Pb
This paper aims at assessing the concentrations of heavy metals and the isotopic composition of lead 210Pb in different fractions of sediment produced in the watershed that makes up the Mãe d'água dam and thus characterizing the distribution of metals along the sedimentary column and inferencing in the urbanization of the same process. Sample collection was carried out in June 2014; eight sediment cores were sampled in the lake of the dam. For extraction of the sediments core, a core sampler “Piston Core” was used. The trace metal concentrations were determined by conventional atomic absorption spectrophotometric methods. The samples were subjected to radiochemical analysis of 210Po. 210Pb activity was obtained by measuring 210Po activity. The chronology was calculated using the constant rate of supply (CRS). 210Pb is used to estimate the sedimentation rate.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1125491Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 777
 Manahan, S. E. (2000). Environmental chemistry. Boca raton: lewis publishers.
 Alloway, B.J. (2010) heavy metals in soils: trace metals and metalloids in soils and their bioavailability. Hoboken, nj: john wiley and sons.
 Kabata-Pendias, A.; Pendias, H. Trace elements in soils and plants. 3. Ed. Londres, 2001.
 Loring, D.H., Rantala, R.T.T., 1992. Geochemical analyses of marine sediments and suspended particulate matter. Fisheries and marine services. Technical report 700.
 Flynn, W.W., 1968. Determination of low levels of polonium-210 in environmental materials. Analytica chimica acta 43, 221–227.
 Sezgin, N., Ozcan, H. K., Demir, G., Nemlioglu, S., & Bayat, C. (2003). Determination of heavy metal concentrations in street dust in istanbul e-5 highway. Environment international, (29), 979-985.
 EPA (U.S. Environmental Protection Agency). 1996a Guidelines for Reproductive Toxicity Risk Assessment. EPA/630/R-96/009. Risk Assessment Forum, U.S. Environment Protection Agency, Washington, DC. October 1996 (online). Available: http://www.epa.gov/ncea/raf/pdfs/repro51.pdf (accessed mar. 15, 2015).
 Poleto, C., & Merten, G. H. (2008). Estudos de zn e ni em sedimentos fluviais em suspensão e o risco potencial aos recursos hídricos. Revista brasileira de recursos hídricos, 13, 147-154.
 Poleto, C., & Gonçalve S, G. R. (2006). Qualidade das Amostras e Valores de Referência. In: Poleto, C., & Merten, G. H (Org.), Qualidade dos Sedimentos (p. 01-38). Porto Alegre, RS: ABRH.