Being different from traditional ion exchange resin, the ion exchange process of ACA was sol-gel phase transformation, which was a novel ion adsorbent.

• 与传统离子交换树脂显著不同，ACA将吸附剂海藻酸钠微囊化，离子交换是被交换离子与微胶囊内海藻酸形成离子移变凝胶的溶胶-凝胶相转移过程，是一种离子取代凝胶。