摘要
反相悬浮法制备甲醛保护壳聚糖(CTS)微球,环氧氯丙烷为交联剂β-环糊精反应制得壳聚糖固载环糊精微球。产物用红外光谱、扫描电子显微镜和X射线衍射仪进行表征,并用于吸附2,4-二硝基酚研究。考察了吸附时间、溶液pH值、酚浓度和NaCl含量对吸附的影响。实验结果表明,壳聚糖固载环糊精(CTS-CD)微球具有较好的耐酸碱性能,在pH值为3.6条件下,对2,4-二硝基酚的吸附快速达到平衡,吸附量为325mg/g,吸附符合Freundlich等温方程和二级动力学方程。
Chitosan microspheres immobilized with β-cyclodextrin were prepared by an inverse phase suspension method and cross-linked with epichlorohydrin. Structure of the microspheres was characterized by FTIR,SEM and XRD. The adsorption behavior of the microspheres for 2,4 dinitrophenol was investigated with the effects of adsorption time,pH,sodium chloride content and phenol concentration. Experimental results indicated that the microspheres are insoluble in acidic and basic solutions,and are capable to adsorb 2,4-dinitrophenol effectively. The adsorption reached to 325 mg/g instantaneously for a solution with pH 3.6. The adsorption behavior for 2,4dinitrophenol of the modified chitosan microspheres is fitted into the Freundlich isotherms and pseudo second-order kinetics equation.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2010年第2期233-237,共5页
Chemical Industry and Engineering Progress
基金
福建省自然科学基金(2009J01029和E0810019)
福建省科技重点项目(2009H0030)
泉州市科技计划(2007Z56)资助项目
关键词
壳聚糖
环糊精
微球
吸附
2
4-二硝基酚
chitosan cyclodextrin microspheres adsorption 2 4-dinitrophenol
