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BIBTEX RIS

Utilização dos critérios de avaliação ambiental de metais pesados nos sedimentos de fundo da plataforma continental do Amazonas

2006; Volume: 1; Issue: 1 Linguagem: Inglês

10.5123/s1981-81142006000100007

2317-6237

Edgar Alexandre Reis de Lima, Gilmar Wanzeller Siqueira, Waterloo Napoleão de Lima,

Geochemistry and Geologic Mapping

The used criteria of environmental evaluation in this work, beyond the bioavailability, had been; the enrichment factor (x) and the geoaccumulation index (Igeo). The bioavailability of metals in the studied sediments showed, for some stations, anomalies, being its text many times superior to the concentrations in the total phase of the sediment. This happened, for example, for copper and manganese that, in certain points 40% exceeded, that is the limit suggested in the literature. Our also evidenced that only cobalt got classification considered ‘abnormal’ for the area (x>1 and Igeo=1), but it was characterized that metals are totally associated to its respective present minerals in the shelf.