改性壳聚糖吸附Cr(Ⅵ)的研究进展

Research progress of Cr (Ⅵ) adsorption by modified chitosan

壳聚糖是一种来源丰富、无毒无害的天然吸附材料,对污水中Cr(Ⅵ)有较好的吸附效果。介绍了Cr(Ⅵ)在水溶液中的存在形式、分析了壳聚糖吸附Cr(Ⅵ)的机理,综述了化学改性和复合改性两类壳聚糖的研究进展。详细介绍了交联改性壳聚糖、接枝改性壳聚糖、有机材料复合改性壳聚糖、磁性材料改性壳聚糖、复合载体材料改性壳聚糖的结构、活性官能团类别、吸附原理和应用。最后对改性壳聚糖的新材料研发、制备工艺优化、应用拓展等研究方向进行了展望。

Chitosan is a natural adsorption material with abundant sources,which is non-toxic and harmless and has a good adsorption effect on Cr(Ⅵ)in sewage.This paper introduces the existence form of Cr(Ⅵ)in aqueous solution,analyzes the adsorption mechanism of Cr(Ⅵ)by chitosan,and summarizes the research progress of chemical modification and composite modification of chitosan.The structure,active functional groups,adsorption principle and application of crosslinked modified chitosan,grafted modified chitosan,organic material composite modified chitosan,magnetic material modified chitosan,and composite carrier material modified chitosan were introduced in detail.Finally,the research direction of new material development,preparation process optimization and application expansion of modified chitosan were prospected.