襄阳市农田土壤重金属污染调查及评价

摘要

This aritcle carries out the investigation ,collection and laboratory determination of farmland soil of 16 spots in Xiangyang City ,and determines the heavy metals by using single pollution index and comprehensive pollution index method .The results show that the heavy metals in agricultural soils of Xiangyang City do not exceed the standard conditions ,and the comprehensive evaluation results are clean (security) level .Comparing with the data of the Eleventh Five-Year Period ,the content of Hg ,Zn and Cu has increased ,and the content of Cd ,As ,Cr ,Ni ,Pb has decreased .%通过对襄阳市16个点位农田土壤实地调查、采集及实验室分析测定其重金属含量，采用单项污染指数法和综合污染指数法，评价了襄阳市农田土壤污染状况，发现襄阳市农田土壤重金属含量未出现超标状况，综合评价结果均为清洁（安全）级别。与“十一五”期间数据相比，汞、锌、铜含量有所增加，镉、砷、铬、镍、铅含量有所减少。