玉溪红塔区农田土壤重金属潜在生态风险评价  

Potential ecological risk assessment of heavy metals in farmland soil in Hongta District,Yuxi City

作　　者：刘英[1] 师艾丽[1] 瞿媛[1] 郑超 陈娟[2] 飞云磊 LIU Ying;SHI Ai-li;QU Yuan;ZHENG Chao;CHEN Juan;FEI Yun-lei(Hongta District Center for Disease Control and Prevention,Yuxi 653100,China;Yuxi Center for Disease Control and Prevention)

机构地区：[1]玉溪市红塔区疾病预防控制中心,玉溪653100 [2]玉溪市疾病预防控制中心

出　　处：《环境卫生学杂志》2022年第7期522-525,共4页JOURNAL OF ENVIRONMENTAL HYGIENE

基　　金：2017中央财政转移支付项目(国卫办疾控函[2017])395号。

摘　　要：目的开展农田土壤重金属的潜在生态风险评估,为制定当地土壤环境与健康相关政策提供参考依据。方法基于2017—2020年期间玉溪市红塔区农田土壤中重金属(铅、镉、铬)筛查数据,采用内梅罗指数和潜在生态指数进行评价,绘制风险评价等级地理信息导图。结果农田土壤中重金属的超标率分别为:镉为22.5%,铅为3.7%,铬未检出超标。土壤监测点被镉污染比例占12.5%,本次调查期间土壤中镉含量中位数呈逐年上升,年度之间差异有显著性。内梅罗指数结果表明镉和铅分别为中度和轻度污染。农田土壤中重金属综合潜在生态指数为1.84~96.45,评价为轻微生态风险。结论红塔区农田土壤铅、镉、铬3种重金属风险低,部分点位镉元素超标,需进一步加强对重金属镉污染的防控。Objective To carry out the potential ecological risks assessment of heavy metals in farmland soils,and provide a reference for formaluting of the local soil environmental and health related polices.Methods Nemerow index and potential ecological index were used for evaluation based on the data of the heavy metals lead(Pb),cadmium(Cd),and chromium(Cr)in farmland soil in Hongta district of Yuxi,China,measured in 2017—2020,and MapGIS was used to perform a spatial interpolation analysis of risk level.Results The excess rates of heavy metals in farmland soil were 22.5%for Cd,3.7%for Pb and 0%for Cr.The proportion of soil monitoring points polluted by Cd accounted for 12.5%.There was a gradual increase in the measurement value of Cd over years,with a significant difference from 2017 to 2020.The Nemerow index indicated that Cd and Pb were moderately and slightly polluted.The comprehensive potential ecological index was 1.84-96.45,which resulted as a slight ecological risk.Conclusion The risk of three heavy metals such as Pb,Cd and Cr in farmland soil in Hongta District is low;the Cd level in some points exceeds the standard,and the prevention and control of heavy metal Cd pollution should be strengthened.

关 键 词：农田土壤 重金属 筛查 潜在生态风险 地理信息导图 

分 类 号：R124[医药卫生—环境卫生学]