阴离子β-环糊精磁性微球的制备及选择吸附性能  

Synthesis and selective adsorption properties of anionic β-cyclodextrin magnetic microspheres

作　　者：李凯斌[1] 沈一丁[1] 费贵强 李仲谨[1] 

机构地区：[1]陕西科技大学化学与化工学院 教育部轻化工助剂化学与技术重点实验室,西安710021

出　　处：《功能材料》2014年第10期113-118,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50573046);陕西省科技计划自然基金资助项目(2012JM2016);陕西科技大学研究生创新工程种子资助项目(2013014)

摘　　要：采用β-环糊精(β-CD)、FeCl2、Fe2(SO4)3、Na3P3O9等为主要原料,制备了阴离子β-CD磁性微球(β-CDM),通过X射线衍射、扫描电镜、粒度和热重等对其进行表征、测试,采用原子吸收光谱研究其吸附性能。结果表明,β-CDM呈规整球形,平均粒径为93.5μm,热性能随Fe3O4的引入得以提高,对Cu2+、Mn2+和Zn2+的吸附具有选择性,对Mn2+的吸附量最大,除去率达到98.59%。准二级吸附动力学模拟结果表明,β-CDM对Cu2+、Mn2+、Zn2+的吸附速率常数K2(g/(mg·min))可分别达到0.1851,0.1068,0.1584,对Cu2+吸附达平衡时所需时间最短。循环使用研究表明,β-CDM在磁场作用下具有较好的分离和循环使用性能。In this paper,anionicβ-cyclodextrin magnetic microsphere （β-CDM）was prepared by usingβ-CD, FeCl2 ,Fe2 （SO4 ）3 and Na3 P3 O9 as main materials.The characterization and performance tests such as X-ray diffraction （XRD）,scanning electron microscope （SEM）,particle size analysis,TGA and atomic absorption spectroscopy were further studied.The results show the morphology ofβ-CDM presents regular spherical and the average particle size was 93.5μm.Thermal performance increases with increasing Fe3 O4 content.It demon-strates elective adsorption for Cu2＋,Mn2＋ and Zn2＋.The maximum removal rate of Mn2＋ reaches 98.59%. The simulation results by quasi secondary adsorption kinetics show that the adsorption rate constant K 2 （g/（mg ·min））for Cu2＋,Zn2＋,Mn2＋ can reach 0.1851,0.1068,0.1584,respectively.And it takes the shortest time for Cu2＋ to reach equilibrium.What’s more,recycle studies show thatβ-CDM was in favor of separation and regenerate under the magnetic field.

关 键 词：Β-环糊精 磁性微球 阴离子 吸附 动力学 

分 类 号：X753[环境科学与工程—环境工程]