壳聚糖对镧系金属离子吸附性的研究

Study of the Lanthanide Metal Ions Adsorption Capacity on Chitosan

壳聚糖分子中含有活性基团－ＮＨ２和－ＯＨ，可使其与金属离子形成稳定的配合物．研究了壳聚糖对镧系金属离子在不同浓度，不同时间的吸附性，测试手段辅以电感耦合等离子体原子发射光谱法（ＩＣＰ－ＡＥＳ法）．实验结果表明，壳聚糖对镧系金属离子均有吸附性，吸附序列为Ｎｄ３＋＞Ｌａ３＋＞Ｓｍ３＋＞Ｌｕ３＋＞Ｐｒ３＋＞Ｙｂ３＋＞Ｅｕ３＋＞Ｄｙ３＋＞Ｃｅ３＋，并且吸附作用受离子浓度和反应时间的影响．

There are active groups -NH2 and -OH in chitosan, which can combine with metal inos to form stable coordination compounds. We have studied the adsorption capacity of Lanthanide metal ions on chitosan with ICP- AES. It was found that chitosan has some adsorption capacity of Lanthanide metal ions, and the adsorption order is as follows: Nd3+>La3+>Sm3+>Lu3+>Pr3+>Yb3+>Eu3+>Dy3+>Ce3+. Also the effect of concentration of solution and the adsorption time on the adsorption capacity was studied.