2014年仁寿县农村土壤铅、铬和镉含量调查与分析目的了解仁寿县农村土壤中铅、镉、铬的含量状况，为有关部门采取措施
加强土壤监测和防控，提供科学依据。方法根据《土壤环境监测技术规范（HJ/T166-2004）》分层随机抽取9个乡镇20个行政村采集土壤样品进行检测，石墨炉原子吸收分光光度法测定土壤中铅、镉含量，火焰原子吸收分光光度法测定土壤中铬含量，并对样品进行单因子指数评价和内梅罗指数综合评价。结果60份样品中，土壤铬含量均未超标，土壤镉有48份样品含量超标，超标率为80%，有22份土壤铅含量超标，占36.7%；内梅罗指数综合评价，55.5%左右的乡镇处于重金属轻度污染状态。结论本次调查四川省仁寿县的土壤铬含量均未超标，但铅、镉超标较严重，应采取相应措施，防止铅、镉污染的加重。
标签：土壤污染；重金属；评价
[Abstract] Objective To understand the status of soil lead ，cadmium and chromium content in Renshou city，and to provide scientific basis for related departments to take steps to monitor and control soil pollution. Methods According to The Technical Specification for soil Environmental monitoring （HJ/T166-2004）. The concents of Pb，Cr and Cd in soil samples from 20 Administrative villages of 9 townships were determined ，so as to were assessed by the single factor index evaluation and Nemerow index comprehensive evaluation.Results The Cr content in all of the 60 soil samples did not reached the soil environmental standard limits，while Cd content in 48 soil samples were higher than the soil environmenta1 standardlimits ，the disqualified rate is 80%. As for Pb.in all of the 60 soil samples，22 were over the soil environmenta1 standardlimits （the rate was up to 36.7% ）. Bv Nemerow index comprehensive evaluation.5 in 9 townships were polluted，the disqualified rate is 55.5%. Conclusion The content of Gr in the soil in Renshou iS 1ower.while the pollution of Pb ，Gd iS relatively severe.Measures to contro1 the pollution of Cd and Pb in soil should be carried out.
[Key words] Soil pollution；Heavy metals；Evaluation
仁寿县隶属于四川省眉山市，地处四川盆地中南部，川中丘陵地区，总人口162万人。近年来，随着仁寿县的经济强势发展，乡镇企业的不断增多，农业集中化规模化发展，家禽牲畜的养殖，大量的重金属进入土壤，造成污染。重金属通过这些人类工农业生产活动对大气、水体和土壤造成污染。生物毒性显著的重金属铅、镉、铬等在土壤中的积累迁移，会通过食物链进入人体，导致一些慢性病、畸形、癌症等发生[1]。为了了解仁寿县农村土壤环境的污染状况，该研究采集9个乡镇的农田土壤进行监测，分析土壤中重金属的含量，并进行评价。
1 资料与方法
1.1 样品