四平市典型工业区土壤重金属监测及生态风险评价

Environmental Monitoring and Ecological risk assessment of Heavy Metals in Soils of Typical Industrial Areas in Siping City

本文以四平某化工厂为研究区域,对土壤中重金属(Cu、Zn、Pb、Cd)进行了定性和定量的分析,在此基础上运用了内梅罗综合污染指数法、地累积指数评价法和潜在危害指数评价模型进行了环境风险评价。结果表明,重金属含量与背景值比值大小依次为Pb>Cd>Cu>Zn。Zn污染水平为尚清洁,Cu和Cd的污染超过背景值,三种重金属污染程度达到警戒限,对环境具有轻微生态危害。而Pb达到了重污染的程度,对环境具有很强生态危害。因此研究区需要根据评价等级,制定相应降低生态风险的防治措施,从源头上减少有害重金属元素的生物有效性。

The heavy metals(Cu,Zn,Pb,Cd)in soil of the main chemical plant in Siping City were analyzed qualitatively and quantitatively.The heavy metals pollution and ecological risk were respectively evaluated with the nemerow integrated pollution index,geo-accumulation index and potential ecological risk index methods.The results showed the ratio of content to background value of heavy metals was in the order:Pb>Cd>Cu>Zn.The pollution level of Zn was still clean,while Cu and Cd exceed the background value.Three heavy metals reached the warning limit,which had slight ecological harm to the environment.However,Pb has reached the level of heavy pollution,which had a strong ecological harm to the environment.Therefore,according to the evaluation level,the study area needs to formulate the corresponding control measures to reduce the ecological risk,and reduce the biological effectiveness of harmful heavy metals from the source.