基于饮用水除氟的改性壳聚糖制备技术研究进展

Recent research progress of preparation of modified chitosan for defluoridating drinking water

在众多的除氟技术中,吸附法是最常用的方法。壳聚糖以其无毒、易降解、廉价易得等优点,成为制备新型除氟剂的理想材料。综述了交联壳聚糖、羧甲基壳聚糖、壳聚糖/稀土配合物、过渡金属改性壳聚糖等衍生物的制备方法、机理及其对水中氟离子的吸附效果,并对今后的研究方向进行了展望。

Among all the treatments proposed, adsorption technique is the most widely accepted and also an applied method for the removal of fluoride from drinking water. Chitosan is an ideal material for preparation of fluoride removal agents based on its excellent properties such as non-toxicity, biodegradability and low-cost. The preparation methods, mechanisms and adsorption effects of several chitosan derivatives including cross-linking, carboxyl methylation and chitosan metal complexa are reviewed. And the future research directions are also put forward.