化工学报2012，Vol.63Issue(3)：834-840,7.DOI:10.3969/j.issn.0438-1157.2012.03.023
磁性交联壳聚糖对水溶液中铀(Ⅵ)离子的吸附行为
Adsorption behavior of U(Ⅵ) ions from aqueous solution on novel cross-linked magnetic chitosan beads
摘要
Abstract
The performance of a novel cross-linked magnetic chitosan (TTG-MCTS), which is coated with magnetic fluids and cross-linked with glutaraldehyde and thiourea, is investigated for the adsorption of U(Vl) from aqueous solutions. Infrared spectra of chitosan before and after modification show that the coating is successful and the cross-linking process is effective. The energy dispersive spectroscopy (EDS) analysis before and after adsorption indicates that U ( VI ) is adsorbed successfully onto the TTG-MCTS. The influences of the pH of solution, the initial concentration of U (VI) ions and the contact time on the adsorption amounts are discussed, and appropriate process conditions for the adsorption of U (VI) are obtained. Experimental equilibrium data are obtained and modeled using classical Freundlich and Langmuir adsorption isotherms. The data fits to the Langmuir isotherm better, and the uptake of U (VI) is 161. 3 mg · g-1. Two simplified models including pseudo-first order and pseudo-second order equations are selected to follow the adsorption process. The experimental data for the kinetics of adsorption are correlated well with the pseudo-second order equation.关键词
磁性交联壳聚糖/铀(Ⅵ)/吸附容量/等温式Key words
cross-linked magnetic chitosan/uranium/adsorption capacity/isotherms分类
化学化工引用本文复制引用
黄国林,陈中胜,梁喜珍,SHI Jeffrey..磁性交联壳聚糖对水溶液中铀(Ⅵ)离子的吸附行为[J].化工学报,2012,63(3):834-840,7.基金项目
江西省自然科学基金项目(2009GZH0004) （2009GZH0004）
东华理工大学放射性地质与勘探技术国防重点学科实验室项目(2010RGET15). （2010RGET15）
