The contribution of heavy metal pollution derived from highway runoff to Guanabara Bay sediments: Rio de Janeiro / Brazil

Anais da Academia Brasileira de Ciências

Edisio Pereira²  José A. Baptista-neto²  Bernard J. Smith¹  John J. Mcallister¹ 

[1] ,Universidade Federal Fluminense Departamento de Geologia/LAGEMAR Niterói RJ ,Brasil

关键词: heavy metals;    urban runoff;    Guanabara Bay;    metais pesados;    escoamento urbano;    Baía de Guanabara;   

DOI  :  10.1590/S0001-37652007000400013

来源: SciELO

【 摘 要 】

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.

【 授权许可】

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