改性壳聚糖对重金属的吸附研究进展

Research Progresses on Adsorbing Heavy Metals with Modified Chitosan

壳聚糖是一种环境友好型生物大分子材料。其分子骨架上具有大量的-NH2和-OH,与大部分重金属有较好的螯合作用,对重金属污染处理有较好的应用前景。壳聚糖直接用于吸附水中重金属会存在难分离,吸附量低,易流失等缺点,因此亟需对其进行改性。近年来,相关学者对壳聚糖处理水中重金属领域开展了大量研究,并取得了较大的进展。本文对壳聚糖通过接枝、交联、分子印迹等方法改变其性能,及其对水中重金属的处理效果进行了综述。为科研人员后续研究壳聚糖吸附重金属提供一定的依据。

Chitosan is an environmentally friendly biomacromolecular material. The molecular skeleton has a large number of-NH2 and-OH, and has a good chelating effect with most of the heavy metals, and has a good application prospect for the treatment of heavy metal pollution. The direct application of chitosan to the adsorption of heavy metals in water has the disadvantages of difficult separation, low adsorption, easy loss, etc. Therefore, it is urgent to modify it. In recent years, relevant scholars have conducted extensive research on the treatment of heavy metals in water with chitosan, and have made great progress. In this paper, the properties of chitosan were modified by methods such as grafting, cross-linking and molecular imprinting, and the effects of treating heavy metals in water were reviewed. For researchers to follow-up study of chitosan adsorption of heavy metals provide a basis.