| 三聚磷酸二氢铝吸附Cd~(2+)的动力学研究 |
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| 引用本文： | 黄增尉,白丽娟,马少妹,袁爱群,姚兴东,邓光辉.三聚磷酸二氢铝吸附Cd~(2+)的动力学研究[J].离子交换与吸附,2010,26(1). |
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| 作者姓名： | 黄增尉 白丽娟 马少妹 袁爱群 姚兴东 邓光辉 |
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| 作者单位： | 广西民族大学化学与生态工程学院,化学与生物转化过程新技术重点实验室,南宁,530006 |
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| 基金项目： | 国家自然科学基金(20566003);;广西民族大学博士启动基金;;广西高校人才资助项目(桂教人[2009]62号) |
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| 摘 要： | 采用动态吸附法研究三聚磷酸二氢铝吸附镉离子的动力学行为并进行吸附活化状态热力学参数分析。结果表明,当三聚磷酸二氢铝粒径小于150μm、搅拌器转速大于200r/min、Cd2+的初始浓度为500mg/L时,三聚磷酸二氢铝对镉离子的化学吸附符合二级反应动力学方程,吸附速率常数k与温度T之间的关系符合Arrhenius方程式,吸附的活化能为Ea=27.93kJ/mol,吸附的频率因子A=65.33L/mg·min,ln(k/T)与1/T之间的关系符合Eyring公式,其活化焓ΔH=25.44kJ/mol,活化熵ΔS=-218.54J/mol·K。
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| 关 键 词： | 三聚磷酸二氢铝 镉离子 吸附 动力学 |
ADSORPTION KINETICS OF Cd~(2+) ON ALUMINUM DIHYDROGEN TRIPOLYPHOSPHATE |
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| HUANG Zengwei,BAI Lijuan,MA Shaomei,YUAN Aiqun,YAO Xingdong,DENG Guanghui.ADSORPTION KINETICS OF Cd~(2+) ON ALUMINUM DIHYDROGEN TRIPOLYPHOSPHATE[J].Ion Exchange and Adsorption,2010,26(1). |
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| Authors: | HUANG Zengwei BAI Lijuan MA Shaomei YUAN Aiqun YAO Xingdong DENG Guanghui |
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| Institution: | HUANG Zengwei BAI Lijuan MA Shaomei YUAN Aiqun YAO Xingdong DENG Guanghui Department of Chemistry , Ecology Engineering,Guangxi University for Nationalities,Nanning 530006,China |
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| Abstract: | Dynamics of adsorption for cadmium ion using aluminum dihydrogen tripolyphosphate was studied by dynamic adsorption method, and thermaldynamic parameters were calculated. The results show that the adsorption of cadmium ion on aluminum dihydrogen tripolyphosphate is a second order reaction kinetics equation when the particle size of aluminum dihydrogen tripolyphosphate is less than 150μm, the rotational velocity is more than 200r/min and Cd~(2+) initial concentration is 500mg/L. The relationship between reaction rate constant k and temperature T accords with Arrhenius Equation, and the activation energy of adsorption E_a is 27.93kJ/mol and frequency factor A is 65.33L/mg·min. The relationship between ln(k/T) and 1/T accords with Eyring Equation, and the activation enthalpy of adsorption ΔH is 25.44kJ/mol and the activation entropy of adsorption ΔS is -218.54J/mol·K. |
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| Keywords: | Aluminum dihydrogen tripolyphosphate Cadmium ion Adsorption Kinetics |
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