大环江两岸农田重金属污染现状及健康风险评价  

Status and Health Risk Assessment of Heavy Metal Pollution of Farmland Soil in Two Sides of Great Huanjiang River

作　　者：唐成[1,2] 宋同清[2,3] 杨钙仁[1] 彭晚霞[2,3] 曾馥平[2,3] 杜虎[2,3] 谭秋锦[1,2] 

机构地区：[1]广西大学林学院,广西南宁530004 [2]中国科学院亚热带农业生态研究所亚热带农业生态过程重点实验室,湖南长沙410125 [3]中国科学院环江喀斯特生态系统观测研究站,广西环江547100

出　　处：《农业现代化研究》2013年第5期613-616,共4页Research of Agricultural Modernization

基　　金：广西科技项目(编号:桂科攻1123001-9C);中国科学院西部行动计划项目(编号:KZCX2XB310);中国科学院战略性先导科技专项(编号:XDA05050205、XDA05070404);国家科技支撑计划(编号:2011BAC09B02);国家自然科学基金项目(编号:31370485、31370623和U1033004);广西特聘专家项目共同资助

摘　　要：大环江流域的源头区域是我国著名的矿区,长期以来不合理的矿产资源开发利用行为导致了大环江沿岸农田严重的重金属污染。本文选取大环江沿岸的农田进行调查分析,共取土样127个,结果表明,两岸农田主要是受到镉(Cd)、锌(Zn)、铅(Pb)的污染,污染概率分别达到了60.63%、45.67%、11.81%,铜(Cu)、镍(Ni)、铬(Cr)、汞(Hg)、砷(As)的污染相对较少。通过单项污染和综合污染指数法得出,整体上土壤污染还是比较严重,对人体健康存在潜在的风险,污染主要集中在中上游。建议在污染严重地区采取工程治理措施,或者改变污染农田利用模式,即根据新的土壤资源特点,设计土地利用模式。Source region of Huanjiang River is a famous mining area. The farmland soil of the two sides of Great Huanjiang River was polluted seriously by heavy metal for long time, unreasonable mineral utilization. Here, to survey and analysis pollution status, we collected 127 soil samples in the farmlands of the two sides of Great Huanjiang River. The results showed that the experimental region was mainly polluted by Cd, Zn, Pb. And the pollution probability of these elements were 60.63%, 45.60% and I 1.81%, respectively. The pollution ofCu, Ni, Cr, Hg, and As were less than Cd, Zn, and Pb. Individual pollution and integrated pollution index indicated overall soil pollution was quite serious, and had potential health risks, and pollution was mainly concentrated in the middle and upper reaches. Engineering control measures or changing land-use mode of contaminated farmland is recommended in seriously polluted areas. In other words, land use patterns will be redesigned according to the characteristics of soil resources.

关 键 词：大环江 重金属 污染现状 健康风险评价 

分 类 号：X131.3[环境科学与工程—环境科学]