摘要
为揭示工矿企业污水灌溉对土壤环境质量的影响,以锡矿企业废水污灌区为例,对其表层土壤重金属Hg、As、Cd、Pb、Cr含量及pH值进行测定分析。对照国家《土壤环境质量标准》二级标准,采用标准对比法、单因子污染指数法和综合污染指数法,对污灌区土壤环境质量进行了评价。结果表明,研究区土壤pH值介于3.83～6.45之间,均值为5.14,土壤偏酸;Hg和Pb单因子污染指数全部样本为一级,土壤清洁且安全;Cr和Cd单因子污染指数分别有2.22%和4.44%的样本为二级,达到警戒级,说明土壤尚清洁,未受到污染;As单因子污染指数2.22%的样本为三级,Pi>1,达轻污染级,为主要污染因子,表明土壤已受到As轻度污染;研究区综合污染指数值为1.16,达到轻度污染级。
The content of Hg, As, Cd, Pb, Cr and pH values of the soil irrigated by the wastewater of tin mining enterprises were analyzed to evaluate the impact of the tin mining wastewater irrigation on soil environment quality. The soil environmental quality as evaluated using standard contrast, single factor pollution index and comprehensive pollution index method. The results showed that the soil pH value was from 3.83 to 6.45, its average was 5.14; The single factor pollution index of Hg and Pb in all samples reached first level, indicating a clean and safe soil; The single factor pollution index of Cr and Cd with 2.22% and 4.44% of all samples reached second level, indicating that the soil still unpolluted but with an alert; The single factor pollution index of As reached third level which a slight pollution in 2.22% of all sample, its Pi was more than 1, indicating that the soil had been contaminated by As. The comprehensive pollution index was 1.16 in all samples, illustrating a slight pollution level.
出处
《农业环境与发展》
2013年第4期41-44,共4页
Agro-Environment and Development
基金
云南省农产品质量安全专项(2130109)
关键词
锡矿废水
土壤重金属
污染指数法
土壤环境质量
tin mine wastewater
soil heavy metal
pollution index method
soil environmental quality
