摘要
目的 监测安康市农田土壤铅、镉、铬、砷、汞污染现状,评价其潜在生态风险,以保护群众身体健康,为制订政策措施提供依据和技术支持。方法 依据全国农村环境卫生监测工作方案对农村土壤监测的要求,于2017年-2021年每年选取2个~4个县监测,5年覆盖完该市九县一区,不同年份重复县区的检测以最近年限检测结果为依据,共10个区域采样,每个点分别采集20份,共200份土壤样品,采用原子吸收和原子荧光法检测,运用污染指数法和潜在生态风险指数法,对潜在生态风险进行评价。结果 土壤中铅、镉、铬、砷、汞平均含量分别为21.00 mg/kg、0.39 mg/kg、21.98 mg/kg、4.95 mg/kg、0.057 mg/kg。结论 安康市各县区农田土壤铅、砷、铬基本没有污染,镉和汞有不同程度污染,其中镉重度污染。安康市的农田土壤存在中度的潜在生态风险,主要贡献为镉元素。有关部门应当加强土壤重金属的监管和监测,尤其是镉,做好相应的宣传教育工作。
Objective To monitor the pollution status of lead,cadmium,chromium,arsenic,mercury in farmland soil in Ankang City and evaluate their potential ecological risk,so as to protect the health of the people and provide basis and technical support for policy making.Methods According to the requirements of rural soil monitoring in the National Rural Environmental Health Monitoring Program,2-4 counties were selected into the surveillance every year from 2017 to 2021,covering nine counties and one district of Ankang City.The latest monitoring result of the county involved in different years of surveillance was selected as the reference.Every 20 samples were collected at each of the 10 regions,and a total of 200 soil samples were collected.The samples were detected by atomic absorption and atomic fluorescence,and the potential ecological risks were evaluated by pollution index and potential ecological risk index.Results The average contents of lead,cadmium,chromium,arsenic,mercury in soil were 21.00 mg/kg,0.39 mg/kg,21.98 mg/kg,4.95 mg/kg and 0.057 mg/kg,respectively.Conclusion The farmland soil in all counties and districts of Ankang City is basically free of lead,arsenic and chromium pollution,but has different degrees of cadmi-um and mercury pollution,among which cadmium pollution is serious.There are moderate potential ecological risks in farmland soil in Ankang City,mainly caused by cadmium.Relevant departments should strengthen the supervision and monitoring of heavy metals in soil,especially cadmium,and do a good job in the corresponding publicity and education work.
作者
王娟
姜玮
冯慧
高文瑞
周杰
陆璐
WANG Juan;JIANG Wei;FENG Hui;GAO Wen-rui;ZHOU Jie;LU Lu(Ankang Municipal Center for Disease Control and Prevention,Ankang,Shaanxci 725000,China)
出处
《中国卫生检验杂志》
CAS
2022年第13期1657-1660,1664,共5页
Chinese Journal of Health Laboratory Technology
关键词
安康
土壤
重金属
污染状况
潜在生态风险
Ankang
Soil
Heavy metals
Pollution status
Potential ecological risk
