Heavy metal pollution and ecological risk assessment of the paddy soils near a zinc-lead mining area in Hunan
作者： Sijin Lu , Yeyao Wang , Yanguo Teng , Xuan Yu , None
DOI: 10.1007/S10661-015-4835-5
关键词:
摘要: Soil pollution by Cd, Hg, As, Pb, Cr, Cu, and Zn was characterized in the area of mining smelting metal ores at Guiyang, northeast Hunan Province. A total 150 topsoil (0-20 cm) samples were collected May 2012 with a nominal density one sample per 4 km(2). High concentrations heavy metals especially, Zn, Pb found many taken from surrounding paddy soil, indicating certain extent spreading pollution. Sequential extraction technique risk assessment code (RAC) used to study mobility chemical forms soils their ecological risk. The results reveal that Cd represents high due its highest percentage exchangeable carbonate fractions. Cu pose medium risk, rest represent low environmental range potential soil calculated index (RI) 123.5~2791.2 revealed considerable-high especially neighboring activities area. Additionally, cluster analyses suggested such as could be same sources probably related acidic drainage wind transport dust. Cluster analysis also clearly distinguishes similar characteristics according spatial distribution. during screening stage, conjunction fractionation values better estimate
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