Abstract
AbstractA study of the total mercury and methylmercury distribution in esturine sediments is presented. Core sediments obtained in a polluted area were freeze‐dried and sieved to obtain four fractions. Fraction 1, having grain size <0.30 mm; Fraction 2, having grain size <0.30 mm; Fraction 3, with grain size <1 mm and Fraction 4, having particle size >1 mm. In all these fractions total mercury (Cold Vapor AAS) and methylmercury (Gas Chromatography with ECD detection) have been analyzed. As expected high concentrations of total mercury and small concentrations of methylmercury were obtained in Fractions 1 and 2 but were not detected in Fractions 3 and 4, although the study of the data obtained suggests that significant amounts of geochemical mercury remain in these fractions. Attempts have been made to correlate data for both species when freeze dried sediments and the raw wet samples were analyzed.
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