β-环糊精聚合物对亚甲基蓝染料分子的吸附对比研究

Comparative Adsorption Study of Methylene Blue on β-Cyclodextrin Polymers

为了更好研究环糊精与环氧氯丙烷交联聚合物水凝胶(CD-EPI)的吸附性能,以β-CD-EPI以及羧甲基化的β-环糊精聚合物水凝胶(CM-β-CD-EPI)为吸附剂,对比研究了不同吸附条件下二者对亚甲基蓝(MB)染料分子的吸附性能,得出:对于带电的MB分子来说,CM-β-CD-PAM较β-CD-PAM具有更高的吸附速率;中性或者碱性环境较酸性环境更适合这两种吸附剂对MB的吸附;由于环糊精的空腔包结作用,高温不利于吸附剂对MB的吸附。

In order to investigate the adsorption performance of cyclodextrin- epichlorohydrin polymers （CD-EPI） , β-CD-EPI and its carboxymethyl derivative （CM-β-CD-EPI） as adsorbents were used to adsorb methylene blue （MB） in aqueous solution. The results showed that CM-β-CD-PAM had higher adsorption performance for MB than β-CD- PAM. Better adsorption of MB was obtained in neutral and basic media than in acidic media. Because of inclusion complexes between adsorbents and MB, a higher temperature was unfavorable for the adsorption of MB.