摘要
为了解中国南方某钨矿污染区叶菜类蔬菜中的重金属含量分布状况和食用安全性,分别对农户家93份蔬菜样品中Cd、Pb、As和Zn的污染状况和健康风险进行分析。结果表明,三类蔬菜样品中Pb、As、Cd、Zn均有检出,平均质量比分别为0.093、0.043、0.23和6.46mg/kg湿重。单因子污染指数评价结果表明,红皮菜中Cd属于中污染,其余均属于优良级别。综合污染指数评价方法结果显示,红皮菜重金属综合污染指数为1.74,属于轻污染级别,而包菜和空心菜综合污染指数分别为0.40和0.30,属于优良级别。蔬菜重金属THQ(Target Hazard Quotient)均值从大到小依次为:Cd>Pb>Zn>As。红皮菜的重金属复合风险指数远远高于空心菜和包菜。食用本地蔬菜摄入的重金属对儿童造成的健康风险高于成人。
In order to investigate the status of heavy metal pollution and edible safety evaluation in vegetables in Tungsten Pollution Area of South China,total of 93 vegetable samples from rural households are collected.Pollution status and health risk of Cd,Pb,As and Zn are analyzed.The results show that Cd,Pb,As and Zn are detected in three types of vegetable samples with the average content of 0.093,0.043,0.23 and 6.46mg/kg wet weight.The single factor pollution index assessment shows that Cd in redskin vegetable is at the medium pollution level and other metals are at clean levels.The comprehensive factor pollution index assessment shows that metals in redskin vegetable is at the light level with the index of 1.74,and in cabbage and spinach are clean level with the indexes of 0.40 and 0.30.The mean of heavy metal THQ（Target Hazard Quotient）of vegetables from large to low is as follows：CdPbZnAs.The compound health risk index is much higher than cabbage and spinach.Health risk of heavy metal from the intake of local vegetables is higher for children than for adults.
出处
《中国农村水利水电》
北大核心
2015年第3期71-75,共5页
China Rural Water and Hydropower
基金
国家环保公益性行业科研专项(201309049)
