改性壳聚糖对重金属离子的吸附研究和应用进展

Study and Application of Adsorption of Heavy Metal Ions by Modified Chitosan

壳聚糖是一种来源广泛、无毒、易降解的天然高分子材料,其分子中的羟基和氨基等功能团能形成活泼的界面,可以与重金属离子进行螯合,发生吸附作用;通过对壳聚糖进行适当的改性,可以提高壳聚糖的物理稳定性,选择吸附性。综述了采用交联、交联模板、羧甲基化、Schiff碱化、含氮、硫、磷等杂原子等方法对壳聚糖进行改性及其对重金属离子吸附的研究和应用进展。

Chitosan is one of the most abundant natural polymers,which is nontoxic,biodegradable,and can be chelated with heavy metal ion by the active interface which is made by chitosan＇s functional groups such as hydroxyl, amine groups. Chitosan＇s derivatives have good stability and excellent selective adsorbability, In this paper,the recent studies of its derivatives which are prepared by the means of crosslinking,template crosslinking, carboxymethy derivatives, schiff base derivatives, chitosan derivatives containing, nitrogen, phosphorus, sulphur and other methods are reviewed mainly on their adsorption abilities for metal ions.