期刊
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS
卷 79, 期 4, 页码 739-750出版社
ACAD BRASILEIRA DE CIENCIAS
DOI: 10.1590/S0001-37652007000400013
关键词
heavy metals; urban runoff; Guanabara Bay
In this study, geochemical and particle size analyses of thirty-four street sediment samples collected from an urban environment around Guanabara Bay, shows highway run-off to be a potential source of heavy metals for the pollution. of near-shore sedimentary deposits. Concentrations of Fe, Mn, Zn, Cu, Pb, Cr and Ni were found to be higher in these sediments when compared to concentrations found in samples from the natural environment, where an Enrichment Factor (EF) index was used to distinguish between natural and anthropogenic sources. Particle size analysis shows these sediments to be predominantly composed of sand and no distribution pattern was observed between the sand, silt and clay fractions. High levels of organic matter and heavy metals would indicate that these street run-off materials are a potential source of pollution for the near-shore sediments of Guanabara Bay.
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