可再生纤维素/环糊精聚合物对水中亚甲基蓝吸附行为  

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

作　　者：陈雯婧 吴远悦 谢知音 于金贝 彭琦 CHEN Wenjing;WU Yuanyue;XIE Zhiyin;YU Jinbei;PENG Qi(College of Resources and Environment,Chengdu University of Information Technology,Chengdu 610225,China)

机构地区：[1]成都信息工程大学资源环境学院,四川成都610225

出　　处：《合成化学》2023年第1期52-60,共9页Chinese Journal of Synthetic Chemistry

基　　金：2021年四川省大学生创新创业训练计划项目(202110621041);成都信息工程大学科研基金资助项目(KYTZ202117)。

摘　　要：利用甘蔗渣提取纤维素修饰环糊精聚合物,制备了可再生纤维素/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=7、温度为30℃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。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.

关 键 词：可再生纤维素 环糊精聚合物 吸附 亚甲基蓝 资源化 

分 类 号：X5[环境科学与工程—环境工程]