改性蒙脱土去除水中重金属离子研究新进展

重金属离子污染具有非降解性、持续存在和累积的性质，影响着人类的生命安全。如何从水中去除重金属离子已经成为治理水污染的核心问题之一，其方法之一就是采用改性蒙脱土进行吸附处理。本文介绍了近年来重金属离子吸附用改性蒙脱土的研究新进展，重点回顾了无机改性蒙脱土、有机改性蒙脱土和无机有机复合改性蒙脱土的改性方法及其对重金属离子的去除能力及机理。提出今后改性蒙脱土研究的主要方向是合成多功能高吸附性的蒙脱土高分子复合微球、蒙脱土高分子凝胶和滤膜材料等，为今后改性蒙脱土作为重金属离子优良吸附剂的研究有一定的指导意义。

Progress in development of modified montmorillonite for adsorption of heavy metal ions

Heavy metal pollution represents a serious threat to the living population because of their non-degradable, persistent, and accumulative nature. How to remove heavy metal ions from the water has become one of key water issues, and one of the most effective treating methods is adsorption with modified montmorillonite. In this paper, the progress in development of modified montmorillonite for adsorption of heavy metal ions was reviewed, in particular, the sorts and structures of the modified montmorillonite were introduced, such as organic modified montmorillonite, organic modified montmorillonite, and inorganic-organic clay. The paper summarizes the removal ability and mechanism of heavy metal ions by modified montmorillonite and confirms that the modified montmorillonite have excellent feasibility in adsorbing heavy metal ions in water. The preparation of efficient multipurpose montmorillonite/polymer microspheres, hydrogels and membranes will be the research direction of the future. This paper can provide certain scientific directions for study on the modified montmorillonite for adsorption of heavy metal ions in the future research.