永城矿区土壤重金属污染评价研究

将永城矿区所在的永城市1994.4 km2土地面积按7 km×7 km网格均匀分为41个采样点,调查表层土壤Cu、zn、Pb、Cd、Ni、Cr、As和Hg 8种重金属的含量,利用数据统计方法进行数据处理;查清矿区土壤环境背景值,采用背景值、地质累积指数和标准对比评价方法对永城市土壤重金属元素污染进行评价,以此判断重金属...

Studies of Evaluation on Heavy Metals Contamination in Soil of Yongcheng Mining Areas

According to 7 km×7 km grid method,a land area of 1 994.4 km2 in Yongcheng is divided into 41 sampling points evenly.The contents of Cu,Zn,Pb,Cd,Ni,Cr,As,Hg in top soil are evaluated,which are processed with statistical method;After checking up environment background values in soil,index of geoaccumulation and standard contrast are used to evaluate the heavy metals contamination in soil in Yongcheng mining areas so as to evaluate the contamination degree of heavy metals.The results showed that:the variation degree of the heavy metal elements in soil is Cd>Cu>Pb>Cr>Hg>Zn>As>Ni.Although the distribution of the eight elements are not being the same,they have not obvious difference.The contamination degree of heavy metals is Hg>Cd>Pb>Zn>Cr>As>Cu>Ni.Therefore,soil in Yongcheng has fairly good environmental quality,and the heavy metal contamination in soil is basically unrelated to the mine exploitation.