Spreading of pollutants from alkaline mine drainage. Rodalquilar mining district (SE Spain)

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• 作者：V. Gonzá ; lez ; ^{vga220@ual.es} ; I. Garcí ; a ; F. del Moral ; S. de Haro ; J.A. Sá ; nchez ; M. Simó ; n
• 关键词：Semi-arid climate ; Gold mining ; Alkaline drainage ; Pollutant spread
• 刊名：Journal of Environmental Management
• 出版年：2012
• 出版时间：15 September, 2012
• 年：2012
• 卷：106
• 期：Complete
• 页码：69-74
• 全文大小：472 K

文摘

In the Rodalquilar mining district of SE Spain, a total of 46 soil samples that were between 0 and 20?cm in depth were taken from the tailings dump, stream sediments, and surfaces that were presumably were unaffected by mining. In each soil sample, organic carbon content, pH, particle size distribution and total and soluble trace element content were analysed. Pollutants were scattered by runoff from two source areas: tailings from Au mining (Sn, Sb, As and Se) and wastes from Pb mining (Pb, Cu and Zn). Sn, Pb, and Sb were spread mostly in the solid phase of the runoff, while Cu, Zn, As and Se were spread in both the solid and soluble phases of the runoff. The pollutants with the highest soluble concentrations were As and Se, which were scattered at greater distances from the source. Some evidence suggests that tailings from Au mining could also be scattered by wind, but no farther than 1500?m from the source.