中南某锑矿及其周边农田土壤与植物重金属污染研究

以南方某锑(Sb)矿区周边土壤与植物为研究对象,采集土壤与植物样品,测定其Sb、As、Cd、Zn、Pb浓度,研究土壤和植物中重金属的污染程度及富集特征。结果表明,矿区周边土壤受Sb污染严重,各采样点全量Sb为3.08~219 mg/kg,平均54.0 mg/kg,同时伴有As、Cd、Zn和Pb污染,其中Cd污染相对严重;但土壤中Sb与土壤As、Cd、Zn和Pb没有相关性,土壤As、Cd、Zn和Pb之间呈极显著的线性相关。矿区周边植物同样受到严重的Sb、As、Cd和Pb的污染,蔬菜可食部分Sb最高达2.05 mg/kg,存在较高的人体摄入风险,且蔬菜中As和Pb超标严重。所采集植物中水麻对Sb有较强的积累和转移能力,是修复Sb污染土壤的潜在植物资源。

Heavy Metal and Metalloid Pollution of Soils and Plants in Typical Antimony Mining Area of Central-south China

Investigation the heavy metals or metalloid pollution in antimony mining areas in central-south China was the main object in this paper, soil samples and plant samples were collected and their accumulation features, concentrations of Sb, As, Cd, Zn, Pb were determined. The results showed that soils in the investigated region were polluted by Sb, As, Cd, Zn and Pb, the concentration of Sb in the soil samples was 3.08-219 mg/kg, with the average of 54.0 mg/kg, there was no significant correlation between Sb and As, Cd, Zn, Pb, while As, Cd, Zn and Pb had certain correlations. Plant samples also severely polluted by Sb, As, Cd, Pb and Debregeasia orientalis was capable of accumulating Sb, and could be used to remediate Sb contaminated soils. In conclusion, soil and plants in this region were polluted, prevention and control of metal(loid)s pollution need be concerned.