摘要
将永城矿区所在的永城市1 994.4 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,以此判断重金属污染程度.综合评价结果表明:永城市土壤重金属各元素平均变异程度Cd>Cu>Pb>Cr>Hg>Zn>As>Ni,尽管各元素分布不尽相同,但总体上差异不大;重金属污染程度Hg>Cd>Pb>Zn>Cr>As>Cu>Ni,永城土壤虽存在一定程度重金属污染,但总体上土壤环境质量较好,土壤重金属污染与煤矿的开采关系不大.
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 CdCuPbCrHgZnAsNi.Although the distribution of the eight elements are not being the same,they have not obvious difference.The contamination degree of heavy metals is HgCdPbZnCrAsCuNi.Therefore,soil in Yongcheng has fairly good environmental quality,and the heavy metal contamination in soil is basically unrelated to the mine exploitation.
出处
《河南科学》
2011年第4期484-488,共5页
Henan Science
基金
国家自然科学基金项目(40871086)
关键词
土壤重金属
数理统计
环境背景值
地质累积指数
heavy metals in soil
statistical method
environment background values
index of geoaccumulation
