新罗区科桃村食用笋原产地土壤重金属污染现状

Heavy Metal in Soil from a Certain Producing Area of Bamboo Shoots in Ketao Village of Xinluo District and Assessment of Present Pollution Situation

在新罗区科桃村食用笋原产地选取111个采样点,竹笋根系采集相应土壤样品,测定汞(Hg)、砷(As)、铅(Pb)含量。采用单项污染指数法和综合污染指数法进行土壤重金属污染评价,采用潜在生态危害指数法评估潜在生态风险。结果表明:Hg、As、Pb含量平均值分别为0.022、5.8、11.4 mg·kg^-1,均未超标。土壤重金属污染评价结果表明,本研究区域土壤重金属污染水平较低、相对安全,土壤尚清洁。潜在生态风险评估结果表明,本研究区域土壤重金属潜在生态危害程度较低,均为轻微生态风险,3种重金属单项潜在生态危害系数:Hg>As>Pb。

In order to study the current status of heavy metal pollution in soil from a certain producing area of bamboo shoots in Ketao village of Xinluo district,111 sampling sites were selected from producing area of bamboo shoots,and corresponding soil samples were collected to determine mercury(Hg),arsenic(As)and lead(Pb)concentration.Single pollution index and total pollution index were used to assess soil heavy metal pollution,and potential ecological risk index was used to evaluate the potential ecological risk.The results showed that the average Hg,As and Pb concentration were 0.022,5.8 and 11.4 mg·kg^-1,respectively,showing not exceeding related evaluation standards.The results of soil heavy metal pollution assessment showed little pollution in study area,so it was relatively safe,and the soil was still clean.The results of potential ecological risk evaluation showed that less potential ecological hazard of soil heavy metals in study area(just slight ecological risks),and the potential ecological risk index of three heavy metals were Hg>As>Pb.