【摘要】 为了研究人们的生产活动所产生的重金属对土壤环境的影响,以定襄县的3个自然村为研究对象,测定了土壤中的Cd、Hg、As、Pb、Cr、Cu、Ni、Zn等8种重金属,采用单因子污染指数法、综合污染指数法等方法,对所采集到的土壤样品中的重金属污染状况进行评价,并研究了土壤中重金属的潜在生态风险,为进一步对土壤污染进行修复提供可以参考的技术支撑。结果表明,研究区土壤重金属含量均未超过国家二级标准;单因子污染指数评价结果表明,Cd在各采样点均未构成污染,北庄村大棚处受到Zn的污染较为严重,北庄村大田处受到Hg的污染较为严重,宏道东街处受到As的污染较为严重,凉楼台大棚处受到Cu、Cr和Ni的污染较为严重,凉楼台大田处受到Pb的污染较为严重。内梅罗综合评价结果表明,北庄村大田和宏道东街的污染状况比其他采样点较为严重;地累积指数评价结果表明,各重金属的污染顺序为Hg>Zn>Cr>Cu>Pb>Ni>As>Cd;各重金属中Hg的生态风险最大,单个潜在生态危害程度为Hg>Cd>As>Cu>Pb>Ni>Cr>Zn;综合潜在的生态危害评价结果表明,在宏道东街处,综合为中等生态危害,其余点为轻微生态危害。更多还原

【Abstract】 To study the effects of heavy metals generated by people’s production activities on the soil environment, the three natural villages in Dingxiang county were used as research objects to determine Cd, Hg, As, Pb, Cr, Cu, Ni, Zn, etc. in the soil. The paper used the single factor pollution index method, comprehensive pollution index method and other methods to evaluate the heavy metal pollution in the collected soil samples, the potential ecological risk of heavy metals in soil was also studied, to provide technical support and experimental basis for further soil pollution repairs. The results showed that the content of heavy metals in the soil did not exceed the national secondary standard in the study area. The single factor pollution index showed that Cd did not constitute at each sampling point. The pollution of Zn in the greenhouse of Beizhuang village was more serious. The pollution of Hg in the field of Beizhuang village was more serious. The pollution of As in Hongdao East Street was more serious. The pollution of Cu, Cr and Ni in the greenhouses of Liangloutai village were more seriously. The pollution of Pb in the field of Liangloutai village was more serious. The comprehensive evaluation results of Nemero showed that the pollution status of Beizhuang village field and Hongdao east street were more serious than other sampling points. The evaluation results of the accumulation index indicated that the pollution order of heavy metals was Hg>Zn>Cr>Cu>Pb>Ni>As>Cd. The ecological risk of Hg in each heavy metal was the largest, and the degree of single potential ecological hazard was Hg>Cd>As>Cu>Pb>Ni>Cr>Zn. The results of the comprehensive potential ecological hazard assessment showed that at the Hongdao east street, the comprehensive potential ecological hazard is medium, and the rest is slight ecological hazard.更多还原