| 姜冰,王庆节,李彤,阎峰.化学通报,2015,78(3):277-280. |
| 氨基功能化离子印迹硅胶对Cd2 的吸附行为及机理 |
| Equilibrium, kinetic and thermodynamic studies on the adsorption of Cd2 onto amino-functionalized ion-imprinted silica |
| 投稿时间：2014-07-09 修订日期：2014-09-20 |
| DOI： |
| 中文关键词: 离子印迹 镉 动力学 吸附模型 热力学 |
| 英文关键词:Ion imprinted Cadmium Kinetics Isotherm Thermodynamics. |
| 基金项目:国家自然科学基金项目(21107076)和(21477082)资助 |
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| 中文摘要: |
| 研究了氨基功能化离子印迹硅胶对镉离子的吸附行为及机理,进行了等温吸附模型和吸附动力学的测定和吸附热力学计算。研究结果表明：饱和吸附量的实验值为30.7mg/g；20min即可达到吸附平衡；等温吸附曲线符合Langmuir等温吸附模型,吸附过程以单层吸附为主；Cd(II) 的吸附动力学数据均符合准二级反应动力学模型；反应的吉布斯自由能为负值,焓变为23.01kJ/mol,熵变为104.1J/mol.K,说明吸附是一个吸热的自发进行的过程。 |
| 英文摘要: |
| The adsorption behaviour of cadmium (II) on amino-functionalized ion-imprinted silica was investigated. The adsorption kinetics,adsorption isotherms and thermodynamic calculations were carried out. The results showed that the experimental value of maximum static adsorption capacity of the imprinted sorbent was 30.7mg/g and the adsorption equilibrium could be reached in 20 min. The adsorption process of cadmium (II) followed Langmuir isotherms models and the adsorption process was mainly single-layer. Pseudo-second order rate model best described the kinetics of the adsorption reaction. The Gibbs free energy was negative, ΔH0 and ΔS0 were 23.01kJ/mol and 104.1J/mol.K, respectively, which indicated the adsorption was a spontaneous and endothermic process in nature. |
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