摘要
以水溶液中的Cu(Ⅱ)离子作为研究对象,对磁性N位-壳聚糖的负载性能进行研究,并对其负载机理进行了初步探讨。研究了各因素如p H值、初始溶液浓度及反应时间等对其负载性能的影响,并将其负载效果与传统以戊二醛为交联剂制备的磁性交联壳聚糖进行对比。结果表明:尽管磁性N位-壳聚糖和磁性交联壳聚糖对Cu(Ⅱ)的吸附等温线均符合Langmuir模型,但其负载效果要远远优于磁性交联壳聚糖。综合FTIR、XPS和BET比表面积分析,可知磁性N位-壳聚糖对Cu(Ⅱ)的吸附不是简单的物理吸附,而是通过螯合作用结合在一起,参与螯合的功能基团和负载机理被提出,该负载性质类似于N·O型螯合剂。
The loaded properties and mechanisms of magnetic N site-chitosan on Cu （ Ⅱ ） ions in solution were studied. The effects on loaded properties of each factor such as pH, concentration of initial solution and reaction time were studied, and the uptake capacity of magnetic N site-chitosan was compared with magnetic crosslinking chitosan prepared by conventional emulsion-crosslinking method using glutaraldehyde as crosslinking agent. The results indicate that the uptake capacity of magnetic N site-chitosan is superior to magnetic crosslinking chitosan, though both of the adsorption isotherms belong to Langmuir model. Uniting the analysis results of FFIR, XPS and BET, it is seen that the adsorption on Cu （ Ⅱ ） ions of magnetic N site-chitosan is not simple physical adsorption, but chelating action. The functional groups of participating in chelating and the loaded mechanisms are confirmed, and the loading property is similar to N ·O-type chelating agent.
出处
《化学工程》
CAS
CSCD
北大核心
2017年第2期21-25,32,共6页
Chemical Engineering(China)
基金
金陵科技学院博士启动基金资助项目(jit-b-201309)
江苏省自然科学青年基金资助项目(BK20130095)
关键词
磁性N位-壳聚糖
负载性能
负载机理
螯合
magnetic N site-chitosan
loaded properties
loaded mechanisms
chelating
