聚乙烯亚胺改性秸秆纤维素接枝GMA共聚物对Cr(Ⅲ)、Zn(Ⅱ)的吸附研究  

Study on the adsorption of Cr(Ⅲ)and Zn(Ⅱ)by Cell-PGMA-PEI copolymer

作　　者：王中华[1,2] 周炜 朱亮[1] Wang Zhonghua;Zhou Wei;Zhu Liang(College of Environment,Hohai University,Nanjing 210098;School of Pharmacy,Taizhou Polytechnical Institute,Taizhou 225300)

机构地区：[1]河海大学环境学院,南京210098 [2]泰州职业技术学院药学院,泰州225300

出　　处：《化工新型材料》2020年第11期198-202,208,共6页New Chemical Materials

基　　金：江苏高校“青蓝工程”资助项目(20190302160)。

摘　　要：以水稻秸秆纤维素为原料,甲基丙烯酸缩水甘油酯(GMA)为单体,过氧化苯甲酰为引发剂,通过水溶液聚合法制备秸秆纤维素接枝GMA共聚物(Cell-PGMA),并用聚乙烯亚胺(PEI)进行改性,得到产物Cell-PGMA-PEI,采用红外光谱(FT-IR)对其进行结构表征。在静态条件下,考察初始浓度、吸附时间和pH等因素对Cell-PGMA-PEI吸附Cr^3+、Zn^2+的影响。Cell-PGMA-PEI对Cr^3+的吸附符合Langmuir方程,Freundlich方程能够更好地拟合其对Zn^2+的吸附过程,对两者的吸附动力学均符合伪二阶动力学模型。Using cellulose of rice straw as raw material,glycidyl methacrylate as monomer,benzoyl peroxide as initiator,copolymer of straw cellulose grafted GMA was prepared by aqueous solution polymerization,and modified by polyethyleneimine(PEI).Cell-PGMA-PEI was obtained,and its structure was characterized by FT-IR.Under static condition,the effects of initial concentration,adsorption time and pH on the adsorption of Cr^3+and Zn^2+by CellPGMA-PEI were studied.The adsorption of Cr^3+by Cell-PGMA-PEI accorded with Langmuir equation,Freundlich equation can better fit the adsorption process of Zn^2+,and the adsorption kinetics of both accorded with pseudo secondorder kinetics model.

关 键 词：水稻秸秆 共聚物 吸附 去除率 吸附容量 

分 类 号：TQ321.2[化学工程—合成树脂塑料工业]