工业水处理 ›› 2022, Vol. 42 ›› Issue (3): 41-46. doi: 10.19965/j.cnki.iwt.2021-0213

• 专论与综述 • 上一篇    下一篇

转炉钢渣处理酸性矿山废水的研究进展

杨磊1,2(),曹端宁3,王叶雷3,张硕3,鹿存房3()   

  1. 1.中国矿业大学(北京)地球科学与测绘工程学院, 北京 100083
    2.贵州中贵环保科技有限公司, 贵州 贵阳 550005
    3.重庆理工大学化学化工学院, 重庆 400054
  • 收稿日期:2021-12-16 出版日期:2022-03-20 发布日期:2022-03-21
  • 通讯作者: 鹿存房 E-mail:598770429@qq.com;lucunfang@cqut.edu.cn
  • 作者简介:杨磊(1984— ),博士研究生。E-mail:598770429@qq.com|鹿存房,副教授。E-mail:lucunfang@cqut.edu.cn
  • 基金资助:
    贵州省科技计划项目(20204Y007)

Research process on treatment acid mine drainage by basic oxygen furnace slag

Lei YANG1,2(),Duanning CAO3,Yelei WANG3,Shuo ZHANG3,Cunfang LU3()   

  1. 1.School of Earth Sciences and Surveying Engineering, China University of Mining & Technology, Beijing 100083, China
    2.Guizhou Zhonggui Environmental Technology Co. , Ltd. , Guiyang 550005, China
    3.School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China
  • Received:2021-12-16 Online:2022-03-20 Published:2022-03-21
  • Contact: Cunfang LU E-mail:598770429@qq.com;lucunfang@cqut.edu.cn

摘要:

酸性矿山废水(Acid mine drainage,AMD)普遍具有pH低,Fe、Mn等离子浓度高的特点,其任意排放对环境危害很大。采用工业固体废弃物对酸性矿山废水进行中和吸附处理,具有成本低、效率高、资源综合利用率高等优点,其已成为酸性矿山废水处理的发展趋势。钢渣中含有大量的碱性物质,且吸附效果好,适于作为AMD的处理材料。对钢渣处理酸性矿山废水的研究现状进行了分析,认为钢渣适于处理废弃小型闭坑矿废水,其处理效果受钢渣成分、废水成分、工艺参数等因素的综合影响。钢渣中的含钙组分为中和AMD的主要碱性物质,特别是自由CaO的含量以及含钙组分在渣中的存在形态对处理效果影响较大。钢渣对AMD中不同离子的去除效率有所不同,其中,对Cu2+、Cd2+、Pb2+、As3+、PO43-等离子的去除效率较高,对SO42-的去除效率较低。另外,废水pH对处理效果的影响也较大,当pH低于钢渣表面零点电荷值时,不利于钢渣对AMD中离子的吸附。通过对钢渣进行改性处理、优化工艺参数可提高钢渣处理AMD的效果。另外,对处理AMD后的钢渣进行应用评估,对于该技术的推广应用具有重要意义。

关键词: 转炉钢渣, 酸性矿山废水, 中和法, 改性

Abstract:

Acid mine drainage(AMD) is generally characterized by low pH and high concentration of Fe and Mn,and its arbitrary discharge is harmful to the environment. Neutralization and adsorption treatment of acid mine drainage by industrial solid waste has the advantages of low cost,high efficiency,and high comprehensive utilization rate of resources. It has become the development trend of acid mine drainage treatment. Steel slag contains a lot of alkaline substances and has good adsorption effect,which is suitable for the development and research of AMD treatment materials. The research status of treating AMD with steel slag is analyzed. It shows that steel slag is suitable for treating small,abandoned mine drainage,and the treatment effect is comprehensively affected by steel slag compositions,AMD composition,and technological parameters. Calcium containing components are the main alkaline substances neutralizing AMD,especially the content of free CaO and its existing form in slag,which have great influence on the neutralization effect of wastewater. The removal efficiency of different ions in AMD by steel slag is different. The removal efficiency of Cu2+,Cd2+,Pb2+,As3+ and PO43- is higher,while that of SO42- is lower. In addition,the pH of wastewater also has a great influence on the removal of AMD. When the pH is lower than the zero charge value on the surface of steel slag,it is not conducive to the adsorption of ions in AMD. Modification treatment of steel slag-based adsorbent and optimization of process parameters can improve the effect of steel slag treatment for AMD. In addition,evaluation of steel slag after treatment of AMD are also important for the extension and application of this technology.

Key words: basic oxygen furnace slag, acid mine drainage, neutralization, modification

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