多乙烯多胺改性磁性壳聚糖复合材料制备及其对Cu^(2+)的吸附性能  

Preparation of Magnetic Chitosan Composite Modified by Polyethylene Polyamine and Its Adsorption Properties for Cu^(2+)

作　　者：钱敏杰 刘杰[1] 吴占超[1] 匡少平[1] QIAN Minjie;LIU Jie;WU Zhanchao;KUANG Shaoping(College of Chemistry and Molecular Engineering,Qingdao University of Science and Technology,Qingdao 266042,China)

机构地区：[1]青岛科技大学化学与分子工程学院,山东青岛266042

出　　处：《青岛科技大学学报（自然科学版）》2022年第1期14-20,共7页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金项目(51472132,41673112).

摘　　要：制备了一种新型的多乙烯多胺(PEPA)改性壳聚糖磁性复合材料PEPA-CS/Fe_(3)O_(4)。通过红外(IR)、热重分析(TGA)、X-射线衍射(XRD)和扫描电镜(SEM)对复合材料进行结构表征;并对复合材料吸附溶液中Cu^(2+)性质进行了研究。探讨了吸附时间、吸附温度、pH值、初始浓度和重复使用次数对吸附性能的影响;讨论了复合材料吸附Cu^(2+)的动力学、热力学性质和吸附机理。结果表明:当pH为5.5,初始浓度为200mg·L^(-1),吸附时间为1h,投放量为20mg·(25mL)^(-1)时,达到最大吸附容量69.2mg·g^(-1)。复合材料对Cu^(2+)的吸附性能优异,吸附后能从溶液中快速分离。5次重复利用后吸附容量为初次吸附量的77.60%。In this paper,a new polyethylene polyamine modified magnetic chitosan composite PEPA-CS/Fe_(3)O_(4)was prepared.The structure of the composite was characterized by infrared(IR),thermogravimetric analysis(TGA),X-ray diffraction(XRD)and scanning electron microscopy(SEM).The effects of adsorption time,adsorption temperature,pH value,initial concentration and reuse times on the adsorption performance of Cu^(2+)on PEPA-CS/Fe_(3)O_(4)were investigated.The kinetics,thermodynamic properties and adsorption mechanism of Cu^(2+)adsorption on the composite were discussed.The results show that when pH is 5.5,initial concentration is 200mg·L^(-1),adsorption time is 1h,and dosage is 20mg·(25 mL)^(-1),the maximum adsorption capacity is 69.2mg·g^(-1).The composite has excellent adsorption performance for Cu^(2+),which can be separated from the solution rapidly.The adsorption capacity is 77.60%of the initial adsorption capacity after five times of reuse.

关 键 词：多乙烯多胺 改性壳聚糖 Cu^(2+) 吸附 

分 类 号：O647.32[理学—物理化学]