Hydrogeochemical and mineralogical characteristics related to heavy metal attenuation in a stream polluted by acid mine drainage:A case study in Dabaoshan Mine,China

作     者：Huarong Zhao Beicheng Xia Jianqiao Qin Jiaying Zhang 

作者机构：School of Environmental Science and EngineeringSun Yat-Sen UniversityGuangzhou 510275China School of Environmental Science and EngineeringGuilin University of TechnologyGuilin 541004China Guangdong Provincial Academy of Environmental ScienceGuangzhou 510045China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2012年第24卷第6期

页      面：979-989页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：supported by the Guangdong Provincial Natural Science Foundation (No. 06202438) the Research Funds of the Guangxi Key Laboratory of Environmental Engineering,Protection and Assessment (No.GuiKeNeng 0801Z020) 

主　　题：acid mine drainage Dabaoshan Mine heavy metal attenuation hydrogeochemical PHREEQC 

摘      要：Dabaoshan Mine,the largest mine in south China,has been developed since the *** mine drainage （AMD） discharged from the mine has caused severe environmental pollution and human health *** this article,chemical characteristics,mineralogy of ocher precipitations and heavy metal attenuation in the AMD are discussed based on physicochemical analysis,mineral analysis,sequential extraction experiments and *** AMD chemical characteristics were determined from the initial water composition,water-rock interactions and dissolved sulfide minerals in the mine *** waters,affected and unaffected by AMD,were Ca-SO4 and Ca-HCO3 types,*** affected water had a low pH,high SO42 and high heavy metal content and oxidation as determined by the Fe^2＋ /Fe^3＋ *** metal and SO4^2- contents of Hengshi River water decreased,while pH increased,*** was the major mineral at the waste dump,while goethite and quartz were dominant at the tailings dam and *** was transformed into goethite at the tailings dam and *** sulfate ions of the secondary minerals changed from bidentate-to monodentate-complexes ***-Mn oxide phases of Zn,Cd and Pb in sediments increased ***,organic matter complexes of Cu in sediments increased further away from the ***^3＋ mineral precipitates and transformations controlled the AMD water chemistry.