壳聚糖在海水淡化预处理中的研究

Research on Chitosan for Seawater Purification Pretreatment

壳聚糖是天然有机高分子材料,在给水应用和水处理中应用广泛,具有优越的生物相容性和生物可降解性。壳聚糖在反渗透海水淡化预处理中的应用日益受到关注。本文阐述了壳聚糖用于海水淡化预处理的作用机理,包括对近海常见污染物有机悬浮颗粒、藻类、细菌和重金属离子的絮凝沉淀机理,以及作为膜材料预处理海水的机理,并总结了壳聚糖及其衍生物在絮凝沉淀法和膜法海水淡化预处理中的研究进展。新型壳聚糖材料的研究和应用,必能推动反渗透海水淡化工程的蓬勃发展。

Chitosan is a natural organic polymer material, which is widely used in water supply and treatment, and it shows excellent bioeompatibility and biodegradability. There is a growing concern on the application of chitosan in reverse osmosis seawater purification pretreatment. In this paper, the mechanism of chitosan is reviewed as the flocculant to organic particles, algae,bacterium,and heavy metal ions. The mechanism of ehitosan as the membrane material is also introduced. Then the progress of the chitosan and its derivatives as the flocculant and material film in seawater purification pretreatment is reviewed. The research and application of chitosan will promote the vigorous development of reverse osmosis seawater purification.