铅锑冶炼污染场地周边土壤铅污染特征及潜在生态危害评价

Study on Lead Contamination Characteristics and Ecological Risk Assessment of Soils in Wasted Lead-antimony Smelting Plant

通过对铅锑冶炼污染场地周围土壤现场采样及室内测定,检测样品中重金属元素铅含量,分析其污染特征并开展风险评估。结果表明:污染场地周边土壤中铅含量远高于该区域土壤元素背景值,呈现由原有主控污染源向周边逐渐递减的趋势,且向下纵向衰减。对土壤中铅进行单种重金属潜在生态风险评价,结果表明铅局部污染程度已达极强的潜在生态风险,应加强风险管控,及时进行固化稳定化和工程阻隔等土壤修复。

By sampling and determination of soil in wasted lead-antimony smelting plant, the distribution of lead concentration was investigated, and the potential ecological risk was evaluated. The results indicated that there were significant differences between the wasted plant and background values of this region. Lead concentration was cut down from main pollution sources to the surrounding. Parts of the potential ecological risk of lead in this study are very strong. It should pay much attention on risk management and control. Besides, prompt methods of stabilization/solidifition and enhancement of obstruct capability should be applied in soil remediation.