氨基功能化超顺磁性PGMA高分子微球去除废水中的铬(Ⅵ)  

Adsorption of Cr(Ⅵ) in Waste Water by Functional Superparamagnetic PGMA Polymer Microspheres with Amino Groups

作　　者：李鹏飞[1,2] 杨良嵘[1] 李文松[1,2] 黄寅斌[1,2] 王娟[1,2] 孔鹏[1,2] 徐林[1,2] 刘会洲[1] 

机构地区：[1]中国科学院过程工程研究所绿色过程与工程实验室,北京100190 [2]中国科学院研究生院,北京100049

出　　处：《过程工程学报》2011年第4期554-560,共7页The Chinese Journal of Process Engineering

基　　金：国家重点基础研究发展规划(973)基金资助项目(编号:2007CB613507;2009CB219904)

摘　　要：通过渗透沉积过程合成单分散的磁性聚甲基丙烯酸缩水甘油酯(PGMA-NH2)高分子微球,对其进行了SEM,FT-IR,XRD表征.并着重研究了磁性PGMA-NH2高分子微球对Cr(Ⅵ)的吸附性能及吸附机理.结果表明,此磁性高分子微球对Cr(Ⅵ)有较高的吸附量,等温吸附数据符合Langmuir模型,在温度298.15K,pH=4.5时,吸附剂的饱和吸附容量为263.16mg/g.吸附量与废水中Cr(Ⅵ)的离子形式有关,pH=1.5时吸附效果最好,在15min内达到平衡.吸附以离子交换与静电引力为主,自发进行,焓变ΔH0=9.63kJ/mol.Micron-sized monodisperse superparamagnetic polyglycidyl methacrylate （PGMA） particles with functional amino groups were prepared and characterized by SEM, FT-IR and XRD, respectively. The effect of pH value on the adsorption was studied. Their adsorption properties and mechanism for Cr（VI） from wastewater were investigated. In a model system, the adsorption process followed the Langmuir adsorption isotherm, and the maximum sorption capacity of was calculated to be 263.16 mg/g at 308 K and pH 4.5. The adsorption of Cr（VI） capacity reached equilibrium within 15 min and followed pseudo second order kinetics. The adsorption was a spontaneous and endothermic process with△H0=9.63kJ/mol.

关 键 词：PGMA 氨基 单分散 超顺磁性 CR(VI) 吸附 

分 类 号：TQ425.21[化学工程]