膨润土改性及应用进展

Modification and Application of Bentonite

对膨润土的结构性质、改性技术及改性后处理废水污染物的应用做了综述,对无机改性膨润土中高温培烧、酸改性、盐改性以及有机改性膨润土中各种改性剂的优点及局限性作了总结,着重阐述了近年来的研究热点,即有机改性剂与无机高分子改性剂复合使用的改性方法,目前将改性膨润土应用于实际废水处理仍然存在一些现实问题,但此改性方法工艺简便,改性后的膨润土可同时吸附含重金属离子、含染色剂、含芳香类化合物、含磷等废水中的污染物,且吸附效果显著。

The structural characteristics and modified methods of bentonite were reviewed as well as application of modified bentonite. Benefits and limitations of the heat-treatment,acid-treatment,salt-treatment in inorganic modification and various modifiers of organic modification were summarized. The research focus in recent years was compound use of organic-modifiers and inorganic-modifiers,however,there were some practical difficulties in application of these modified bentonite as adsorbents in wastewater treatment at present,but chemical technique of this modification was feasible,simple and convenient,after modification,the organic-inorganic-bentonite can adsorb pollutants including heavy metal ions,anion dyes,aromatics compounds,phosphates,et al,and the adsorption effect was remarkable.