Especiación de metales pesados en la fracción disuelta de las aguas superficiales de la cuenca baja y la pluma del Río Manzanares, Estado Sucre, Venezuela Heavy metal speciation in the surface water dissolved fraction of the low watershed and plume of the Manzanares River, Sucre State, Venezuela

作者: W Senior , G Martínez , A Márquez , Estado Sucre

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摘要: This paper reports on the speciation of heavy metals (Cd, Pb, Cr, Cu, Ni, Mn, Fe, and Zn) in surface water dissolved fraction low basin plume Manzanares River, state Sucre, Venezuela, based data taken at 22 stations from July 1996 to June 1997. The total metal concentrations phase ranged below detection levels 0.01, 0.02, 0.10, 1.03, 2.56, 5.13 µmol L –1 for Cd, Zn, respectively. Overall, studied revealed a nonconservative behavior with removal salinities, likely due anthropogenic contributions flocculation account Fe- Mn-oxyhydroxide formation resulting shifts pH ion forces that ensue when fresh waters river meet marine mass Gulf Cariaco. fraction, both free hydrated form, had composition which largest proportions were associated humic acids, thus being more readily available organisms.

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