【摘要】 目的通过调查南通市郊3个镇主要农田的土壤、蔬菜中重金属含量,分析、评价检测结果,掌握当地土壤、蔬菜污染现状,提出相应的预防措施。方法分别检测3个样区30件土壤样品,106件蔬菜类样品。按照标准方法研究评价检测区土壤、蔬菜类食品的重金属污染现况。结果若以绿色食品生产地土壤重金属标准为评价标准,3个镇的部分土壤样点重金属为轻微污染。在对8类106份蔬菜样品的研究中,Pb超标蔬菜29份,超标率27.4%;超标样本主要集中在芋头、菠菜和青菜;Cd超标蔬菜25份,超标率23.6%。超标样本主要集中在芋头、菠菜、青菜和土豆。若以无公害食品生产地土壤重金属标准为评价标准,则3个乡镇的重金属污染等级均为安全级。结论综合土壤污染指数评价结果,所调查3个乡镇全部适合开展无公害农业生产;若以绿色食品生产地土壤重金属标准为评价标准,3个乡镇部分样点呈轻度污染,不适合发展绿色农业。三地部分芋头、菠菜和青菜中Pb、Cd含量较高,应引起人们的重视。更多还原

【Abstract】 [Objective]To master the polluting status of soil and vegetables in suburb of Nantong and provide preventive measures,through the investigation of content of heavy metal in soil and vegetables in 3 counties in suburb of Nantong,analysis and evaluation of the results. [Methods]30 soil samples and 106 vegetable samples from 3 sampling areas were collected and then the heavy metal pollution status in these samples was evaluated according to national standard analytic methods. [Results]According to heavy metal standard in soil for green food production,some of the soil sampling points in the 3 counties were slightly polluted. In the study of 106 vegetable samples in 8 categories:lead in 29 samples (27.4%) exceeded national standard; Taro,spinach and green foods were most easily polluted by lead. Cd in 25 samples(23.6%)exceeded national standard,including taro,spinach,green foods and potatoes. According to heavy metal standards for pollution-free food production,the pollution levels of heavy metal in the 3 counties were qualified. [Conclusion]The comprehensive evaluation of the results of the soil pollution index shows that the 3 counties are all suitable for pollution-free food production. Judged by heavy metal standard for green food production,several sampling points are slightly polluted and not suitable for green food production. The contents of Pb and Cd in some samples of the 3 counties were higher,and should attract great attention.更多还原