中国岩溶2009，Vol.28Issue(2)：135-143,9.
酸性矿坑废水对流域酸化的影响——以贵州兴仁县典型废弃煤矿区小流域为例
The basin acidification affected by AMD: A case study in Xingren county, Guizhou,China
摘要
Abstract
Pyrite oxidation at mine sites has been blamed for the acid mine drainage (AMD), which becomes a long term environmental problem in the basin scale. A typical closed mine site in Xingren, Guizhou was chosen to investigate the variation of pH in the AMD and surface water and its effects on the basin acidification. The pH value was found to be around 3.0 in the AMD and acidic water reservoir. When the acidic water flows, it reacted with the rock blocks of limestone in the river. At the same time, AMD has a typical orange or ocherous appearance which is due to the iron hydroxide that is formed during the oxidation. The iron hydroxide precipitates as sludge, forming a coat on river bottom and bank that prevents further reaction of acidic water with the river bed. It was found that the pH value in surface water was kept low even 5km downstream of the sources AMD. The most frequent pH values in soil samples with and without acidic water irrigation were 5.0 and 6.5, respectively, indicating soil acidification within the basin.关键词
酸性矿坑排水/流域酸化/煤矿废渣Key words
acid mine drainage/basin acidification/coal mine dump分类
资源环境引用本文复制引用
唐常源,吴攀,陶秀珍,张翅鹏,韩志伟..酸性矿坑废水对流域酸化的影响——以贵州兴仁县典型废弃煤矿区小流域为例[J].中国岩溶,2009,28(2):135-143,9.基金项目
日本科学振兴会科学研究费(No.19310004)、中国国家自然科学基金(No.40663001)This research was supported from the Grant-in-Aid for Scientific Research of Japan Society for the Promotion of Science (No. 19310004) and the National Natural Science Foundation of China (No. 40663001). （No.19310004）
