猕猴桃产区农田灌溉水重金属污染及风险评价  

Heavy Metal Pollution and Risk Evaluation of Farmland Irrigation Water in Kiwifruit Producing Areas

作　　者：杨雍[1] 任晓姣 栗婷[1] 刘君[1] 张水鸥 黄东亚[1] YANG Yong;REN Xiao-jiao;LI Ting;LIU Jun;ZHANG Shui-ou;HUANG Dong-ya(Xi′an Agricultural Product Quality and Safety Inspection and Monitoring Center,Xi′an 710077,China)

机构地区：[1]西安市农产品质量安全检验监测中心,陕西西安710077

出　　处：《黑龙江农业科学》2022年第9期90-95,120,共7页Heilongjiang Agricultural Sciences

基　　金：西安市科技计划-农业主导产业发展项目(201806114 YF02NC10)。

摘　　要：为了解和掌握西安市周至县猕猴桃主产区农田灌溉水中重金属污染状况,促进灌溉水安全利用及农产品安全生产,提出相应的污染控制措施。以周至县翠峰镇、青化镇、四屯镇等16个乡镇猕猴桃产地环境为研究区域,采集90个点位农田灌溉水样品,测定Hg、Cd、As、Pb、Cr^(6+)5种重金属含量,并开展风险评价。结果表明,单因素污染指数P均小于1,重金属含量低于国家标准最大允许限量,农田灌溉水质总体安全,处于安全级别。潜在生态风险系数(Er)小于40,为轻微风险等级,潜在生态风险指数(RI)小于100属于轻微风险等级。可以看出,周至县猕猴桃产地灌溉水重金属全部在安全范围内,无污染,等级为轻微,可放心利用。In order to understand the pollution status of heavy metal pollution in farmland irrigation water in the main kiwifruit producing area of Zhouzhi County,Xi′an City,to promote the safe utilization and safe production of agricultural products,and put forward corresponding pollution control measures.Taking the environment of kiwifruit producing areas in 16 townships including Cuifeng Town,Qinghua Town and Situn Town in Zhouzhi County as the research area,90 farmland irrigation water samples were collected to determine five heavy metals such as Hg,Cd,As,Pb and Cr^(6+),and the risk assessment was carried out.The results showed that,the single-factor pollution index P was all less than 1,the heavy metal content was lower than the maximum allowable limit of the national standard,and the farmland irrigation water quality was generally safe and at a safe level.The potential ecological risk coefficient(Er)was less than 40,which was a slight risk level,and the potential ecological risk index(RI)less than 100 was a slight risk level.It can be seen that the heavy metals in the irrigation water of the kiwifruit producing area in Zhouzhi County are all within the safe range,no pollution,and the grade is slight,which can be used with confidence.

关 键 词：农田灌溉水 重金属 空间分布 污染评价 

分 类 号：X52[环境科学与工程—环境工程]