潼关县某矿区附近土壤重金属污染程度评价

以潼关县某金矿排水沟附近土壤为研究对象,对土壤中Sn、Sb、Pb、Cu和Cd等7种重金属污染状况进行评价,为金矿周围土壤污染的人工生态修复提供依据。结果表明:矿区附近土壤中Sn、Sb、Cd、Pb、Cu均已达到极严重污染,单项污染指数平均值分别为51.0、119.3、478.7、36.6、9.5;Cd最大值超过评价标准的478.7倍,Sb最大值超过评价标准的119.3倍;Fe、Mn污染相对较轻,但显示出一定的累积。相关性分析表明,Sn-Sb-Cd之间有高的相关性,它们可能为复合污染;Fe-Cu,Fe-Mn之间也有一定相关性,它们可能具有相近或相同污染源。

Assessment of the Heavy Metals Contamination Degree in the Soil around a Mine Drainage in Tongguan County

The contamination degree of seven heavy metals,including Sn,Sb,Pb,Cu,Cd,etc.,in the soil around a gold mine drainage in Tongguan County was assessed and analyzed,providing basis for the artificial eco-restoration of mine soils.As indicated by the results,the soil around the mine has been seriously contaminated by Sn,Sb,Cd,Pb and Cu,their single average contamination values are 51.0,119.3,478.7,36.6 and 9.5,respectively;the maximum Cd content has exceeded 478.7 times of the standards,and the maximum Sb is 119.3 times above the standards;the contamination degree of Fe and Mn is relatively low,but they have presented a certain degree of accumulation.The correlation analysis shows high correlation among Sn,Sb and Cd,they probably produce compound pollution in soils;certain correlation is also found between Fe and Cu,Fe and Mn,they may have close or similar sources of pollution.