改性赤泥吸附废水中典型重金属研究进展

Research Progress on Adsorption of Typical Heavy Metals in Waste Water by Modified Red Mud

  • 摘要: 赤泥(RM)是碱浸铝土矿提取氧化铝过程中产生的大宗工业固废,其累积量大、综合利用率低、生态风险高。水体中重金属污染是一个全球性环境问题,赤泥和重金属的环境危害均不可回避,对二者耦合治理引起学者的广泛关注。本文主要综述了改性赤泥吸附重金属的国内外新进展,通过总结评述赤泥性质和改性方法以及重金属吸附特征,分析了赤泥吸附典型重金属离子的途径和反应机理,总结了赤泥吸附重金属的影响因素及亟待解决的问题,并展望了赤泥在环境吸附材料方面规模化利用的可能性。

     

    Abstract: Red mud( RM) is a large amount of industrial solid waste produced in the process of extracting alumina from bauxite by Bayer process,which has large accumulation,low comprehensive utilization rate and high ecological risk. The pollution of heavy metals in water is a global environmental problem,the environmental hazards of red mud and heavy metals can't be avoided,and the coupling treatment of the two has attracted wide attention of scholars. This paper mainly reviewed the new progress of modified red mud adsorption of heavy metals at home and abroad,through summarizing and reviewing the properties of red mud,modification methods and heavy metal adsorption characteristics,the ways and reaction mechanism of red mud adsorption of typical heavy metal ions were analyzed. The influencing factors and problems to be solved in the adsorption of heavy metals by red mud were summarized. The possibility of large-scale utilization of red mud in environmental adsorption materials was prospected.

     

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