福建闽西矿区周边稻米重金属含量及健康风险评估

发布时间：2017-12-27 01:10

本文关键词：福建闽西矿区周边稻米重金属含量及健康风险评估　出处：《西北农林科技大学学报(自然科学版)》2016年12期 　论文类型：期刊论文

【摘要】：【目的】研究福建闽西矿区周边稻米的重金属污染状况,并对其健康风险进行评价。【方法】以福建闽西矿区周边种植的水稻为研究对象,采用石墨炉原子吸收光谱法测定稻米中Cd、Pb、Cr 3种重金属含量,通过单因子污染指数法和内梅罗综合污染指数法评价稻米中3种重金属的污染状况,利用Monte-Carlo概率模型法评估稻米中3种重金属的健康风险,并探讨了稻米重金属与土壤重金属含量之间的相关性。【结果】研究区稻米存在不同程度的Cd、Pb、Cr含量超标现象,稻米中各元素的单因子污染指数平均值大小顺序为PbCdCr,稻米重金属综合污染指数平均值为1.89,研究区稻米整体处于轻度污染等级。食用研究区稻米有对人体健康造成危害的可能性,不同元素对人体健康风险的大小顺序为CdPbCr。相关性分析表明,水稻对重金属元素Cd、Cr的积累与其对应土壤中重金属含量有一定的关系,并受其共存元素的影响。【结论】福建闽西矿区周边种植的稻米已被重金属污染,且对人体健康造成了一定风险。
[Abstract]:[Objective] to study the heavy metal pollution of rice in the western mining area of Fujian and evaluate its health risk. [method] in Fujian mining area in planting rice as the research object, graphite furnace atomic content of 3 kinds of heavy metals in rice Cd, Pb, Cr using absorption spectroscopy, using the single factor pollution index of 3 heavy metals evaluation method and Nemero method of comprehensive pollution index in rice pollution situation, the health risk of 3 kinds of heavy metals by Monte-Carlo probability model evaluation method in rice, and to explore the correlation between heavy metals and soil heavy metal content in rice. [results] the study area Cd, Pb rice and Cr content exceed the standard in different degrees, the elements of the rice in the single factor pollution index average order of PbCdCr rice, integrated pollution index of heavy metals in an average of 1.89, the study area of rice in the overall light pollution levels. Rice in the research area is likely to be harmful to human health, and the order of the risk of different elements to human health is CdPbCr. Correlation analysis showed that the accumulation of heavy metals Cd and Cr in rice was related to the content of heavy metals in soil, and was affected by their coexisting elements. [Conclusion] the rice planted around the mining area in the west of Fujian has been polluted by heavy metals and has caused a certain risk to the health of the human body.
【作者单位】：福建省农业科学院农业质量标准与检测技术研究所;福建省精密仪器农业测试重点实验室;上杭县农业局农产品质量检验检测站;
【基金】：福建省科技计划项目(2014R1025-1;2015R1025-9)
【分类号】：X56;X82
【正文快照】： 水稻是我国三大主要粮食品种之一,稻米在我国南方居民的膳食结构中占有重要地位[1]。近年来,由于工业化和城市化的发展,工业促进经济发展的同时也对周边的生态环境造成了污染,其中重金属污染就比较严重[2]。2013年湖南“镉米”事件将稻米重金属污染的严重性摆在了公众面前[3],

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