Since the amine group on the chain can act as chelation sites for metal ions, chitosan has already been described as a suitable natural polymer for the collection of heavy-metal ions.

• 在壳聚糖分子结构中存在大量游离氨基和羟基,是一种新型的配位体或螯合剂,主要用于捕集有毒重金属离子。