河流表层沉积物重金属赋存形态及生态风险评价——以内蒙古白音诺尔矿区为例  

Morphological characteristics and ecological risk assessment of heavy metals in river surface sediments in Baiyinnuoer mine,Inner Mongolia

作　　者：余楚 李剑锋 张翼龙[1,2] YU Chu;LI Jian-feng;ZHANG Yi-long(Institute of Hydrogeology and Environmental Geology,Chinese Academy of Geological Sciences,Shijiazhuang 050061,China;Key Laboratory of Groundwater Sciences and Engineering,Ministry of Natural Resources,Zhengding 050803,China)

机构地区：[1]中国地质科学院水文地质环境地质研究所,河北石家庄050061 [2]自然资源部地下水科学与工程重点实验室,河北正定050803

出　　处：《东北师大学报（自然科学版）》2022年第3期131-137,共7页Journal of Northeast Normal University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(41602273)。

摘　　要：通过采样测试对内蒙古大兴安岭山地南段白音诺尔铅锌矿河流表层沉积物中As, Cd, Cu, Pb, Zn共5种重金属元素的赋存形态进行了分析,并应用风险评价编码、潜在生态风险指数和沉积物质量基准对其潜在生态风险进行了评价.结果表明:不同评价方法的评价结果存在一定差异,总体上沉积物中Cd, Pb, As, Zn的潜在生态风险较大,Cu较小.矿区段沉积物重金属的综合潜在生态风险大于上、下游河段,矿山开发对河流生态环境影响较显著.受控于pH的变化,Cd在上、下游河段的生态风险较大,应是重点关注的污染物.The morphological characteristics of five heavy metal elements, As, Cd, Cu, Pb, and Zn in the river surface sediments of the Baiyinnuoer lead-zinc mine in the southern section of the Greater Xing’an Mountains were tested and analyzed.Risk assessment code(RAC),potential ecological risk index(RI) and sediment quality criteria(SQC) were applied to evaluate the potential ecological risks of heavy metals.The results show that there were certain differences in the evaluation results of different evaluation methods.In general, it could be considered that the potential ecological risks of Cd, Pb, As, and Zn in the sediments were relatively large, and the ecological risks of Cu were relatively small.Mine development had a significant impact on the ecological environment of the river.The comprehensive potential ecological risk of heavy metals in the middle reaches of the river flowing through the mining section was greater than the upstream and downstream reaches.Mainly controlled by the change of pH,Cd had a greater ecological risk in the upper and lower reaches of the river, and should be paid attention to in ecological environment management.

关 键 词：重金属 赋存形态 河流表层沉积物 生态风险评价 白音诺尔矿 

分 类 号：X522[环境科学与工程—环境工程]