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  • Title: Total mercury in sediments and in Brazilian Ariidae catfish from two estuaries under different anthropogenic influence.
    Author: Azevedo JS, Braga ES, Favaro DT, Perretti AR, Rezende CE, Souza CM.
    Journal: Mar Pollut Bull; 2011 Dec; 62(12):2724-31. PubMed ID: 22030105.
    Abstract:
    Santos-São Vicente estuary, located in São Paulo State, Brazil, has a history of contamination by inorganic chemicals such as mercury (Hg). In the 1980s the Cubatão was considered one of the most polluted sites in the world as a consequence of the intense industrial activities located in the city close to the estuary. To provide data and evaluate the local biota, total mercury (THg) contents were determined in sediments and in fish, Cathorops spixii, from different areas of the Santos-São Vicente estuary. For comparison, samples were also collected in a non-polluted system with similar hydrochemistry characteristics, the Cananeia estuary. The water characteristics and THg levels in sediment and fish samples confirmed a high human influence in the Santos-São Vicente estuary. The lowest THg values, observed in Cananeia, were evidence of low anthropogenic influence. High values observed in Santos-São Vicente show the necessity for a monitoring program.
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