多乙烯多胺改性磁性壳聚糖复合材料制备及其对Cu2+的吸附性能

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文章编号： 1672-6987（2022）01-0014-07； DOI： 10.16351/j.1672-6987.2022.01.002

钱敏杰, 刘杰*, 吴占超, 匡少平*(青岛科技大学 化学与分子工程学院，山东 青岛 266042)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/Fe3O4。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Cu2+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Cu2+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200 mg·L-1, 吸附时间为1 h, 投放量为20 mg·(25 mL)-1时, 达到最大吸附容量692 mg·g-1。复合材料对Cu2+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％。

关键词： 多乙烯多胺； 改性壳聚糖； Cu2+； 吸附

中图分类号： O 647.32文献标志码： A

引用格式： 钱敏杰, 刘杰, 吴占超, 等. 多乙烯多胺改性磁性壳聚糖复合材料制备及其对Cu2+的吸附性能［J］. 青岛科技大学学报(自然科学版), 2022, 43(1): 14-20.

QIAN Minjie, LIU Jie, WU Zhanchao, et al. Preparation of magnetic chitosan composite modified by polyethylene polyamine and its adsorption properties for Cu2+［J］. Journal of Qingdao University of Science and Technology（Natural Science Edition), 2022， 43（1）： 14-20.

Preparation of Magnetic Chitosan Composite Modified by Polyethylene

Polyamine and Its Adsorption Properties for Cu2+QIAN Minjie, LIU Jie, WU Zhanchao, KUANG Shaoping

(College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042， China)

Abstract: In this paper, a new polyethylene polyamine modified magnetic chitosan composite PEPA-CS/Fe3O4 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 Cu2+ on PEPA-CS/Fe3O4 were investigated. The kinetics, thermodynamic properties and adsorption mechanism of Cu2+ adsorption on the composite were discussed. The results show that when pH is 55, initial concentration is 200 mg·L-1, adsorption time is 1 h, and dosage is 20 mg·(25 mL)-1, the maximum adsorption capacity is 692 mg·g-1. The composite has excellent adsorption performance for Cu2+, which can be separated from the solution rapidly. The adsorption capacity is 7760% of the initial adsorption capacity after five times of reuse.

Key words: polyethylenepolyamine; modified chitosan; Cu2+; adsorption

收稿日期： 2021-03-11

基金项目： 国家自然科学基金项目（51472132, 41673112）.

作者简介： 钱敏杰（1995—），男，硕士研究生.*通信联系人.