Distribution and speciation of mercury in sediments from gold mining sites in iron quadrangle (Minas Gerais)

Química Nova

Windmöller, Cláudia Carvalhinho¹  Fundação Centro Tecnológico de Minas Gerais, Belo Horizonte, Brasil¹  Santos, Regis Costa¹  Athayde, Maycon¹  Universidade Federal de Minas Gerais, Belo Horizonte, Brasil¹  Palmieri, Helena Eugênia Leonhardt¹  Centro de Desenvolvimento de Tecnologia Nuclear, Belo Horizonte, Brasil¹ 

关键词: mercury speciation;    sediments;    iron quadrangle.;   

DOI  :  10.1590/S0100-40422007000500007

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The concentration and thermodesorption speciation of mercury in sediments from four different Iron Quadrangle sites impacted by gold mining activity were determined. The mercury content of some samples was considerably high (ranging from 0.04 to 1.1 µg g-1). Only Hg2+ was found and it was preferably distributed in the silt/clay fraction in all samples. Cluster analysis showed that mercury and manganese can be associated. The occurrence of cinnabar in this region as another mercury source was also discussed, corroborating earlier works showing the importance of natural mercury in the geochemical cycle of the metal in this region.

【 授权许可】

Unknown