摘要
以江苏省沿海地区某县为研究区域,分析当地主要农作物中重金属含量,采用单项污染指数法和综合污染指数法对农作物中重金属污染状况进行评价,并采用目标危害系数法评价该地区农作物对人的健康风险。结果表明:农作物中5种重金属的单项污染指数基本均小于1,处于安全状态。单项污染指数平均值大小顺序为铅>铬>镉>汞>砷。农作物重金属综合污染指数介于0.08~0.73之间,总体处于清洁~尚清洁水平。单一重金属健康风险目标危害系数(THQ)结果显示:水稻和红豆样品中砷的THQ(成人、儿童)以及水稻样品中铬的THQ(儿童)值均大于1,显示了水稻中的砷和铬,以及红豆中的砷可能存在人体健康风险。多种重金属健康风险目标危害系数(TTHQ)分析表明:水稻、红豆、山芋以及萝卜等农作物中重金属复合健康风险TTHQ值介于1.1~5.5之间,可能对成人和儿童存在一定的健康风险,并且对儿童的健康风险大于成人。建议当地环保部门关注该区域人群健康风险问题。
Taking the county of Jiangsu coastal area as the research area, the contents of heavy metals in the main crops were analyzed. The pollution status of heavy metals in crops was evaluated by single pollution index method and comprehensive pollution index method. The crop risk factors were used to evaluate the crop Risk of human health. The results showed that the single pollution index of the five heavy metals in the crops was less than 1, which was in the safe state. The order of the average value of the individual pollution index is lead> chromium> cadmium> mercury> arsenic. Crops heavy metals comprehensive pollution index between 0.08 ~ 0.73, the overall clean-still clean level.(THQ) The results showed that the THQ(adult and children) of arsenic in rice and red bean samples and the THQ values of chromium in rice samples were all greater than 1, which showed that arsenic and chromium in rice were higher than those in the control group. And arsenic in red beans may present a human health risk.(TTHQ) analysis showed that the TTHQ values of heavy metals in crops such as rice, red bean, potato and radish were between 1.1 and 5.5, which could present a certain health risk for adults and children, and the risk of heavy metal risk The health risk for children is greater than that of adults. It is recommended that the local environmental authorities pay attention to the health risks of the population in the region.
出处
《环境与发展》
2017年第8期32-34,36,共4页
Environment & Development
基金
江苏省环境监测科研基金项目(1625)
关键词
农作物
重金属
污染
健康风险
评价
Crop
Heavy metal
Pollution
Health risk
Evaluation
