某铜铅锌多金属矿区土壤重金属污染评价

对某铜铅锌多金属矿区土壤和稻谷样品中重金属元素含量进行分析检测,分析研究了该矿区土壤重金属污染程度、分布范围以及典型稻谷样品中重金属污染情况。结果表明,铜铅锌多金属矿区土壤环境质量总体较好,土壤重金属污染集中分布在选矿厂周边,主要污染元素为Cd和Cu,污染程度以轻度污染为主,Cd元素富集程度相对较高;该矿区尾矿库北侧河流上下游土壤样品重金属含量大致相当,尾矿堆放对北侧河流周边土壤重金属累积影响十分轻微;该矿区周边稻谷样品中Cd元素含量均不超标,矿山采选活动并未对矿区周边稻谷食品安全造成显著影响。

Assessment of Heavy Metal Pollution in Soil in a Cu-Pb-Zn Polymetallic Mining Area

Contents of heavy metals both in soil and rice samples from a Cu-Pb-Zn polymetallic mining area were analyzed. Pollution degree and distribution of heavy metals in soil of this mining area as well as pollution of heavy metals in typical rice samples were studied. The results show that soil environmental quality in Cu-Pb-Zn polymetallic mining area is generally good. Heavy metal pollution in soil is concentrated around concentration plant, and main pollution elements are Cd and Cu, pollution degree of which is mainly in light level. Cumulative degree of Cd element is relatively high. Contents of heavy metals in soil samples from upstream of river on north side of tailings pond are about the same as those from its downstream. Stockpiling of tailings only has a very slight effect on accumulation of heavy metals in soil around river on north side. Contents of Cd element in rice samples in mining area are below the standard, and mining mineral processing has no significant impact on food safety of rice around mining area.