可再生纤维素/环糊精聚合物对水中亚甲基蓝吸附行为

利用甘蔗渣提取纤维素修饰环糊精聚合物，成功制备可再生纤维素/环糊精聚合物（SUG-EPI-CDP）吸附剂。采用傅利叶红外光谱仪（FT-IR）与热重分析仪（TGA）对材料进行表征，同时考察了该材料对水中亚甲基蓝（MB）吸附特性和机理的影响。结果表明：在溶液pH值为7、温度为30 ℃的条件下，SUG-EPI-CDP可在120 min内有效去除MB，去除率达80.9%。通过模型拟合发现，SUG-EPI-CDP对MB的吸附是自发且吸热的过程，符合准二阶动力学方程和Langmuir等温线模型。该吸附剂实验最大吸附量达8.1 mg/g，远高于其他废料所制备的吸附剂。结果表明，利用可再生纤维素修饰可有效提高环糊精聚合物的吸附性能，同时为甘蔗渣资源化利用提供了新途径。

Study of Adsorption Behavior for The Removal of Methylene Blue in Water by Renewable Cellulose/Cyclodextrin Polymer

Renewable cellulose/cyclodextrin polymer (SUG-EPI-CDP) adsorbent was successfully prepared by extracting cellulose from bagasse to modify cyclodextrin polymer. The material was characterized by Fourier infrared spectrometer (FT-IR) and thermogravimetric analyzer (TGA), and the adsorption characteristics and mechanism of methylene blue (MB) on water were investigated. The results showed that under pH 7 and 30 ℃, the removal rate of MB could reach 80.9% within 120 min by SUG-EPI-CDP. The model fitting shows that the adsorption process is spontaneous and endothermic, which is fitted well with the pseudo-second-order kinetic equation and Langmuir isotherm model. The maximum adsorption capacity of SUG-EDI-CDP is 8.1 mg/g, which is much higher than that of other adsorbents prepared from waste. The results show that the adsorption capacity of cyclodextrin polymer can be improved effectively by using renewable cellulose, and a new way is provided for bagasse resource utilization.