江苏大学学报（自然科学版）2013，Vol.34Issue(2)：212-216,5.DOI:10.3969/j.issn.1671-7775.2013.02.016
酵母/硅复合材料对铈(Ⅲ)的吸附性能及机理
Adsorption behavior and mechanism of Ce (Ⅲ) on yeast/silica composite
摘要
Abstract
Yeast/silica composites were prepared by sol-gel method to investigate the adsorption behavior of cerium ions (Ce(Ⅲ) ) in aqueous solution. Based on static adsorption experiments, the effects of pH value, adsorption time, initial concentration, temperature and coexisting ions on the adsorption behavior were investigated. The adsorption process was analyzed by kinetic and isotherm models. The adsorption mechanism was investigated by Fourier transmission infrared spectra and transmission electron microscope. The results show that the optimum pH value is 5.5. The adsorption capacity is increased with the increasing of initial concentration and temperature, and the adsorption reaches equilibrium after 120 min. The coexisting ions have slight effect on the adsorption of Ce (Ⅲ). Pseudo-second-order kinetic model fits the kinetic data well. Langmuir adsorption isotherm model can well describe the adsorption process, indicating monolayer molecular adsorption. At 298 K, the maximal adsorption capacity is 36. 1 mg · g-1.关键词
酵母/硅复合材料/铈/吸附/等温模型/动力学Key words
yeast/silica composite/ cerium/ adsorption/ isotherm model/ kinetics分类
资源环境引用本文复制引用
黄卫红,宋玉君,欧红香,卞维柏,潘建明..酵母/硅复合材料对铈(Ⅲ)的吸附性能及机理[J].江苏大学学报（自然科学版）,2013,34(2):212-216,5.基金项目
江苏省自然科学基金资助项目(BK2011514) （BK2011514）
国家自然科学基金资助项目(21207051) （21207051）
