Studies on Adsorption Behaviors of Aniline ontoγ-Cyclodeztrin Polymer.
γ-Cyclodextrin polymer (γ-CDP) was prepared and characterized. The adsorption behaviors of γ-CDP for aniline from aqueous solution were investigated based on the kinetic and thermodynamic. The influences of adsorption conditions including contact time, initial concentration and pH on adsorption capability were discussed. Results of batch experiments showed that this adsorbent exhibited some sorption capacities toward aniline. It was found that kinetic followed a pseudo-second order (Ho and McKay) equation, suggesting that the rate-limiting step may be chemisorption. Equilibrium isotherm data were analyzed according to Langmuir, Freundlich and Dubinin-Radushkevich (D-R) equations. The D-R isotherm gave the best correlation for the adsorption of aniline on γ-CDP. The calculated Gibbs free energy change values were -16.40 (285 K), -14.53 (303 K) kJ·mol-1, which indicated the spontaneous nature of adsorption.
adsorption adsorbent cyclodeztrin polymer aniline
LI Ning XIONG Xiaoli CHEN Shengming
College of Environmental and Biological Engineering,Chongqing Technology and Business University,Chongqing 400067,China
国际会议
2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)
上海
英文
1331-1336
2009-06-02（万方平台首次上网日期，不代表论文的发表时间）