广西钟山县珊瑚矿周边及下游地区农作物重金属污染调查评价

Evaluation of Heavy Metal Pollution of the Vegetations in Nearby and Downstream Area of Shanhu Deposits,Zhongshan County,Guangxi.

为评价广西钟山县珊瑚矿周边及下游地区农作物重金属污染状况,采集了矿区周边及下游谷类、水果、蔬菜等农作物样品,分析As、Hg、Cd、Pb、Cr五种有害重金属含量。测试结果表明各类农产品均有不同程度的重金属污染,共37个超标样品,占所有样品的58.73%,整体污染情况较严重。叶菜蔬菜重金属污染程度最重,其次为玉米,丝瓜和砂糖橘污染程度较轻。As污染最为普遍,涉及所有农产品品种,Cd、Hg、Pb污染主要集中在叶菜蔬菜中,Cr污染较为轻微。研究表明As和Hg有可能来自附近珊瑚矿排出的废水,其他元素污染主要来自于环境背景或个别其他污染源。

This study takes agricultural plant samples including cereals,fruits and vegetables to analyze the As,Hg,Cd,Pb and Cr elements,in order to evaluate the heavy metal pollution of plants in the nearby and downstream area of Shanhu deposit,Zhongshan County,Guangxi.The results show that all kinds of agricultural products have different degrees of heavy metal pollution,a total of 37 samples exceeding the standard,accounting for 58.73%of all samples,the overall pollution situation is serious.Heavy metal pollution of leafy vegetables is the most serious,followed by corn,luffa and sugar orange are less polluted.Arsenic element pollution is the most common,involving all kinds of agricultural products.Cd,Hg and Pb pollution are mainly concentrated in leafy vegetables,while Cr pollution is relatively slight.The results show that As and Hg may come from the wastewater discharged from the nearby Shanhu deposit,and other element pollution mainly comes from the environmental background or some other pollution sources.