β-环糊精聚合物微球吸附Pb^(2+)的动力学研究  

Study on Adsorption Kinetics of β-cyclodextrin Polymer Microspheres to Pb^(2+)

作　　者：韩春鹏[1] 李仲谨[1] 杨威[1] 李宜洋[1] 丁金皓[1] 

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

出　　处：《化工环保》2010年第6期487-491,共5页Environmental Protection of Chemical Industry

摘　　要：以β-环糊精(3-CD)为原料、环氧氯丙烷(ECH)为交联剂,制得β-环糊精聚合物(β-CDP)微球。研究了β-CDP微球对Pb^(2+)的吸附特性和动力学。实验结果表明,β-CDP微球对Pb^(2+)的吸附既符合一级动力学方程,也符合二级动力学方程。β-CDP微球对Pb^(2+)的Langmuir吸附等温线的线性拟合方程为ρ_e/Q_m=0.049 5ρ_0+0.030 3,相关系数为0.993 7;β-CDP微球对Pb^(2+)的Freundlich吸附等温线的线性拟合方程为lgQ_e=0.145 4 lgρ_e+0.970 1,相关系数为0.992 9。The β-cyclodextrin polymer （/3-CDP） microspheres were synthesized using β-cyclodextrin （/3-CD） as raw material and epichlorohydrin （ECH） as crosslinking agent. The absorption characteristics and kinetics of/3-CDP microspheres to Pb2＋ were studied. The experimental results indicate that the adsorption accords with either the first order kinetics or the second order kinetics. The linear regression equation of Langmuir isotherm is ρc/Qm -- 0. 049 5 p0 ＋ 0. 030 3, with 0. 993 7 of correlation coefficient; The linear regression equation of Freundlich isotherm is lgQo = 0. 1454 lgpc ＋ 0.970 1, with 0.992 9 of correlation coefficient.

关 键 词：Β-环糊精 聚合物微球 吸附 铅离子 动力学 

分 类 号：TQ028.15[化学工程]