Abstract：
Rare earth elements have received a lot of attention in recent years due to their increasing demand in high-tech industries. Cerium is of current interest and is commonly used in different industries and medical applications. Cerium\'s uses are expanding due to its superior chemical characteristics over other metals. In this study, different functionalized chitosan macromolecule sorbents were developed from shrimp waste for cerium recovery from a leached monazite liquor. The process involves demineralization, deproteinization, deacetylation, and chemical modification steps. A new class of two-multi-dentate nitrogen and nitrogen‑oxygen donor ligand-based macromolecule biosorbents was synthesized and characterized for cerium biosorption. The crosslinked chitosan/epichlorohydrin, chitosan/polyamines, and chitosan/polycarboxylate biosorbents have been produced from marine industrial waste (shrimp waste) using a chemical modification approach. The produced biosorbents were used to recover cerium ions from aqueous mediums. The affinity of the adsorbents towards cerium was tested in batch systems under different experimental conditions. The biosorbents showed high affinities for cerium ions. The percentage of cerium ions removed (%) from its aqueous system by polyamines and polycarboxylate chitosan sorbents is 85.73 and 90.92 %, respectively. The results indicated that the biosorbents have a high biosorption capacity for cerium ions from aqueous and leach liquor streams.
摘要：
近年来，由于稀土元素在高科技产业中的需求不断增加，因此受到了广泛的关注。铈是当前感兴趣的并且通常用于不同的工业和医疗应用。铈的用途正在扩大，由于其优于其他金属的化学特性。在这项研究中,不同的功能化壳聚糖高分子吸附剂从虾废物开发铈从浸出独居石液回收。这个过程涉及去矿化，脱蛋白,脱乙酰,和化学改性步骤。合成了一类新的基于两齿多齿氮和氮氧供体配体的高分子生物吸附剂，并对其进行了表征。交联壳聚糖/表氯醇，壳聚糖/多胺，使用化学改性方法从海洋工业废物（虾废物）中生产了壳聚糖/聚羧酸盐生物吸附剂。所产生的生物吸附剂用于从水性介质中回收铈离子。在不同实验条件下在间歇系统中测试吸附剂对铈的亲和力。生物吸附剂对铈离子显示出高亲和力。通过多胺和聚羧酸盐壳聚糖吸附剂从其水性系统中去除的铈离子的百分比（％）为85.73％和90.92％，分别。结果表明，生物吸附剂对水性和浸出液流中的铈离子具有高的生物吸附能力。
