改性赤泥处理酸性矿井废水的试验研究  

Experimental Study on Treatment to Acid Mine Drainage by Modified Red Mud

作　　者：卢仪思 王明明 黄耕 董晓强[1,2] Lu Yisi;Wang Mingming;Huang Geng;Dong Xiaoqiang(College of Architecture and Civil Engineering,Taiyuan University of Technology,Taiyuan,Shanxi 030024;Key Laboratory of Highway Construction and Maintenance Technology in Loess Region,Shanxi Transportation Research Institute,Taiyuan,Shanxi 030006)

机构地区：[1]太原理工大学建筑与土木工程学院,山西太原030024 [2]山西省交通科学研究院黄土地区公路建设与养护技术交通行业重点实验室,山西太原030006

出　　处：《非金属矿》2018年第6期15-18,共4页Non-Metallic Mines

基　　金：国家自然科学基金(51879180);山西省应用基础研究项目(201701D121121);山西省回国留学人员科研资助项目(2017-039)

摘　　要：为了得到赤泥(RM)经济高效处理酸性矿井废水(AMD)的最佳改性温度和反应条件,利用不同温度下改性的拜耳法赤泥处理含Cu^(2+)和Fe^(2+)的酸性矿井废水。探索赤泥的改性温度、固液比、反应时间、反应温度等因素对酸性矿井废水的pH值及Cu^(2+)和Fe^(2+)吸附效果的影响。结果表明:当赤泥改性温度为450℃、固液比为10 g/L、反应时间为6 h、反应温度为25℃时,改性赤泥将酸性矿井废水的pH值提高至7.52,对Cu^(2+)和Fe^(2+)的去除率分别为99.23%和99.93%。此外,采用吸附等温线方程对吸附结果进行拟合,得出改性赤泥对Cu^(2+)和Fe^(2+)的吸附类型为单分子层吸附。In order to obtain the optimal modification temperature and reaction conditions for red mud（RM） treating acid mine drainage（AMD） economically and efficiently, the Bayer red mud modified with different temperature were used to treat AMD which containing Cu^（2＋） and Fe^（2＋） in this paper. Effects of the modification temperature of red mud, solid-liquid ratio of red mud and AMD, reaction time, reaction temperature and other factors on the pH value of the AMD and the adsorption of Cu^（2＋） and Fe^（2＋） in AMD were investigated. The results show that when the red mud modification temperature is 450 ℃, the solid-liquid ratio is 10 g/L, the reaction time is 6 h, and the reaction temperature is 25 ℃, the pH value of the AMD raises to 7.52, the removal rates of Cu^（2＋） and Fe^（2＋） are 99.23% and 99.93%, respectively. Furthermore, the adsorption results are fitted using the adsorption isotherm equation, which show the adsorption type of Cu^（2＋） and Fe^（2＋） on the modified red mud is monolayer adsorption.

关 键 词：拜耳法赤泥 高温改性 酸性矿井废水 单分子层吸附 

分 类 号：X703[环境科学与工程—环境工程]