Journal of the Brazilian Chemical Society | |
Arsenic and Mercury mobility in brazilian sediments from the São Francisco River Basin | |
Patrícia S Rezende1  Priscila A. S Moura1  Walter A Durão Jr1  Clésia C Nascentes1  Cláudia C Windmöller1  Letícia M Costa1  | |
[1] ,Universidade Federal de Minas Gerais ICEx Departamento de QuímicaBelo Horizonte MG ,Brazil | |
关键词: arsenic; mercury; sediment samples; environmental monitoring; São Francisco River; | |
DOI : 10.1590/S0103-50532011000500014 | |
来源: SciELO | |
【 摘 要 】
Sediments have metal accumulation properties, then, an evaluation of their geochemistry cycle is feasible via toxic element determination of these samples. Arsenic and mercury determinations were accomplished in 28 sediment samples from the São Francisco River Basin, Minas Gerais, Brazil. For sample pretreatment were employed a pseudo-total digestion procedure with HCl:HNO3 (3:1 v/v) and a partial extraction procedure with 1 mol L-1 HCl. Arsenic and mercury were analysed by hydride generator atomic absorption spectrometry (HG AAS). Mercury determination was realized in the solid samples by direct mercury analyzer (DMA). It was observed that 46% of the samples presented arsenic concentrations above Brazil's legal limits, and 14% of samples exceeded the established mercury limit. The samples with high mercury content were also analysed by thermodesorption coupled to atomic absorption spectrometry (TDAAS) and only Hg(II) was identified
【 授权许可】
CC BY
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
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