摘要
以纤维素为原料,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FT-IR、元素分析等方法对其进行结构表征。在静态条件下,研究吸附剂用量、吸附时间、溶液初始pH值、温度等因素对Cell-PGMA-PEI吸附Pb^(2+)的影响。Langmuir和伪二阶动力学模型能够更好地拟合Cell-PGMA-PEI对Pb^(2+)的吸附过程,表明其对金属离子的吸附主要是单分子层化学吸附。
Using cellulose as raw material,glycidyl methacrylate(GMA)as monomer,benzoyl peroxide as initiator,cellulose grafted GMA(Cell-PGMA)copolymer was prepared by aqueous solution polymerization,and was modified by polyethyleneimine(PEI),Cell-PGMA-PEI was obtained,and its structure was characterized by FT-IR and elemental analysis.Under static condition,the effects of the dosage of adsorbent,adsorption time,initial pH and temperature on the adsorption of Pb^(2+)by Cell-PGMA-PEI were studied.Langmuir and pseudo second-order kinetic model can better fit the adsorption process of cell PGMA PEI for pb2+,indicating that the adsorption of metal ion is mainly monolayer chemisorption.
作者
王中华
刘明源
陈亚运
朱亮
WANG Zhong-hua;LIU Ming-yuan;CHEN Ya-yun;ZHU Liang(College of Environment,Hohai University,Nanjing 210098,China;School of Pharmacy,Taizhou Polytechnical Institute,Taizhou 225300,China)
出处
《化学工程师》
CAS
2023年第7期88-92,共5页
Chemical Engineer
基金
江苏高校“青蓝工程”资助(No.20190302160)
2021年度泰州市科技支撑计划(社会发展)项目指导性项目(No.202103)。
关键词
纤维素
螯合吸附
去除率
吸附容量
cellulose
chelate adsorption
removal rate
adsorption capacity
