Distribuição, fracionamento e mobilidade de elementos traço em sedimentos superficiais

Química Nova

Janice Cardoso Pereira²  Aline Kelly Guimarães-silva¹  Hermínio Arias Nalini Júnior¹  Érica Pacheco-silva¹  Jorge Carvalho De Lena¹ 

[1] ,Centro Federal de Educação Tecnológica de Minas GeraisBelo Horizonte MG ,Brasil

关键词: sediments;    trace elements;    fractionation;   

DOI  :  10.1590/S0100-40422007000500037

来源: SciELO

【 摘 要 】

The gold and iron mining activities in the Velhas River yield considerable amounts of suspended solids as well as metals to the hydrological system of the region. The risks were assessed by sequential extraction procedures. They were carried out in sediment samples, aiming to evaluate the presence of Co, Cr, Cu, Ni, Zn and As. Although being at high levels in some parts of the river (e.g. As 527 mg g-1 and Cr 475 mg g-1) they are associated with the residual fraction. Mobility factors were also calculated and show that these species are enriched along the river, e.g. for As 0.02 at the spring and 0.33 at the high course of the river.

【 授权许可】

CC BY-NC   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License