广东大宝山矿区横石河沿岸水土重金属分布规律及其累积风险.docxVIP

第 33 卷 第 8 期 2014 年 8 月 地 质 通 报 GEOLOGICAL BULLETIN OF CHINA Vol.33,No.8 Aug.,2014 广东大宝山矿区横石河沿岸水土重金属分布规律 及其累积风险 宿文姬 1，徐友宁 2，凡 生 1，付善明 3 SU Wen-ji1, XU You-ning2, FAN Sheng1, FU Shan-ming3 1.华南理工大学土木与交通学院，广东 广州 510640； 2.中国地质调查局西安地质调查中心，陕西 西安 710054； 3.广州大学环境科学与工程学院，广东 广州 510006 School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, Guangdong, China; Xian Center of Geological Survey, CGS, Xian 710054, Shaanxi, China; School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, Guangdong, China 摘要：研究矿业活动重金属的释放、迁移及累积特征对于控制和治理矿区水土环境污染具有重要的意义。本文通过广东大宝 山矿区水土污染源调查及横石河流域沿岸水土样品采集，以研究区土壤对照值及国家环境质量为标准，试图探讨了大宝山矿 区重金属迁移及累积特征。研究结果表明，横石河沿岸土壤重金属元素主要来自采矿活动的酸性废水的排放，土壤中 Cd、Pb、 Cu 和 Zn 的含量均超过对照值，呈现出明显的累积特征，且 Cd、Cu 含量超过了国家土壤环境质量标准；土壤中重金属累积程 度及其风险等级呈现出从源头向下游递减的特点，其中凉桥、水楼下地段农田重金属处于高风险区，阳河—莲心村虽有累积， 但无风险；上坝村地处土壤重金属累积的中风险区，下坝村处于低风险区。研究结果为矿区重金属污染防治提供了重要依据。 关键词：重金属；酸性水；累积风险；上坝村；大宝山矿区 中图分类号：X131.3；X142 文献标志码：A 文章编号：1671-2552（2014）08-1231-08 Su W J, Xu Y N, Fan S, Fu S M. The distribution regularity and accumulation risk of heavy metals in water and soil along the Hengshi River in the Dabaoshan mining area, Guangdong Province. Geological Bulletin of China, 2014, 33(8):1231-1238 Abstract: The study of the release，migration and accumulation characteristics of heavy metals by mining activities is of important sig? nificance for the prevention and control of environmental pollution of soil and water in the mining area. In this paper, through collec? tion of soil and water samples along the Hengshi River during the survey of Dabaoshan mining pollution and with the soil control val? ues of the study area and the national environment quality as the evaluation standard, the authors studied migration and accumulation characteristics of heavy metals in the Dabaoshan mining area. The result shows that the soil heavy metal elements along the Hengshi River mainly come from mining activities of acid waste water emissions, the co