大宝山尾矿重金属风化淋滤实验研究  

Simulated Weathering and Leaching Experiments on Sulphide-Rich Tailings at Dabaoshan Deposit

作　　者：李媛媛[1] 吴平霄[1] 邢宁[1] 党志[1] 易晓筠[1] 罗汉金[1] 

机构地区：[1]华南理工大学环境科学与工程学院,广东广州510006

出　　处：《矿物学报》2010年第2期235-241,共7页Acta Mineralogica Sinica

基　　金：国家自然科学基金重点项目(No.40730741)

摘　　要：广东大宝山尾矿造成的重金属污染严重影响了矿区的生态环境。对矿区不同采样点的尾矿进行了风化淋滤实验,结果表明,淋滤液的pH值很低（2.5-4.8）并随着淋滤的进行继续降低;淋滤液的电导率不断升高;淋滤液中的SO4^2-浓度有波动,但变化不大。淋滤液中有次生矿物沉淀生成,吸附了部分重金属离子。经过30d的淋滤,重金属Mn的淋滤率最大且可迁移性最强,Pb的淋滤率最小且沉积性最强;拦泥坝泥浆释放的重金属总量最大。Ecosystem has been badly contaminated by heavy metals from tailings near Dabaoshan mine,Guang dong Province,China.Simulated leaching experiments of tailings from Dabaoshan mine were conducted to investigate the release characteristics of heavy metals.Following results were obtained： with increasing leaching time,pH values of maintained at a very low level（2.5～4.8） and trended to decrease continuously,while the electrical conductivity values continuously increased,and SO42-concentrations in the leachates fluctuated irregularly but stabilized within a range.There was a little precipitate in the leachates,on which heavy metal ions were absorbed gradually.After 30 days of leaching,the amount of released Mn reached to the most and Mn tended to be transferred more easily,while the amount of released Pb reached to the least and Pb tended to be deposited more easily,and the amount of the released sample from sediment detention reservoir also reached to the most.

关 键 词：尾矿 重金属 淋滤实验 大宝山 

分 类 号：P599[天文地球—地球化学] X142[天文地球—地质学]