DISTRIBUIÇÃO E FRACIONAMENTO DO Hg EM SEDIMENTOS DO RIO PARAÍBA DO SUL – RJ, BRASIL

Química Nova

Beatriz Ferreira Araujo¹  Marcelo Gomes De Almeida¹  Thiago Pessanha Rangel¹  Carlos Eduardo De Rezende¹ 

关键词: mercury;    sediments;    Paraíba do Sul river;   

DOI  :  10.5935/0100-4042.20140268

来源: SciELO

【 摘 要 】

Mercury distribution and fractionation were determined in sediments from the Paraíba do Sul River – RJ, Brazil. Total mercury concentration ranged from 1 to 158 ng g-1. Hg associated with the weakly bound fraction was dominant in the estuarine areas (main - 60% and secondary - 55%); followed by fluvial end member (48%) and mangrove (18%). These results reinforce the mercury availability to fluvial and estuarine areas and emphasize the key role played by mangroves as an efficient biogeochemical barrier. In conclusion, the continuous reduction of the mangrove ecosystem around the world can exacerbate the damage resulting from the mercury accumulation.

【 授权许可】

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