膨润土-钢渣复合颗粒处理重金属酸性矿山废水吸附-聚沉协同作用机理研究

项目名称： 膨润土-钢渣复合颗粒处理重金属酸性矿山废水吸附-聚沉协同作用机理研究

项目编号： No.51474122

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 矿业工程

项目作者： 肖利萍

作者单位： 辽宁工程技术大学

项目金额： 83万元

中文摘要： 针对含重金属离子酸性矿山废水严重污染环境且处理难现状，结合焙烧改性制得的膨润土-钢渣复合颗粒吸附剂具有高效同步去除重金属离子和降低酸度的特性，开展膨润土-钢渣复合颗粒处理重金属酸性矿山废水吸附-聚沉协同作用机理研究：优选确定复合颗粒最佳制备条件；研究复合颗粒碱度释放机制和对重金属离子Fe2+、Mn2+、Cu2+及Zn2+等的吸附机理、规律和影响因素；研究重金属离子在吸附剂表面沉淀机理、沉淀的赋存形态、再吸附、絮凝重金属离子的聚沉规律和重金属沉淀脱附使表面吸附位获得再生规律；揭示复合颗粒吸附-聚沉协同作用机理；建立吸附-聚沉反应动力学模型，利用自制机械搅动流化床进一步验证机理、完善模型，研究成果对丰富吸附理论有一定意义，为复合颗粒作为新型高效多功能颗粒吸附材料提供理论依据，为开创处理酸性矿山废水新方法、新材料奠定基础，对防治矿山废水污染具有重要理论意义和应用前景。

中文关键词： 酸性矿山废水；重金属离子；膨润土；吸附；协同作用

英文摘要： For the situation of acid mine drainage containing heavy metal ions polluted environment seriously and there are many difficulties to deal with it ,the research was carried out by using bentonite-steel slag composite particles to remove heavy metal ions from the acid mine drainage ,which were characterized by high removing heavy metal ions and reducing acidity.The synergetic mechanism of adsorption-precipitation was investigated as well:The best preparation conditions of bentonite-steel slag composite particles were determined;The alkalinity release mechanism of composite particles and the adsorption mechanism、regularity and influencing factors on removal of heavy metal ion Fe2+, Mn2+, Cu2+ and Zn2+ have also been discussed in the proposal;The proposal studied the precipitation mechanism of heavy metal ions on the adsorbent surface,the occurrence state、re-adsorption of the adsorbent and the coagulation regularity of heavy metal.Meanwhile,the regularity of desorption of precipitate regenerates adsorbent was studied;It revealed the synergetic mechanism of adsorption-precipitation;This proposal set up reaction dynamics model ,used self-made mechanical agitation fluidized-bed to explore the mechanism of adsorption and to perfect the model.The result of research has certain significance to enrich the adsorption theory,and provides theoretical basis for composite particles used as an new effective and multifunctional materials.At the same time,it lays the foundation for the new method and material dealing acid mine wastewater.It has important theoretical significance and applied prospects for preventing and curing acid mine drainage pollution.

英文关键词： acid mine drainage;heavy metal ions;bentonite;adsorption;synergy