| 树脂D301M吸附草甘膦的热力学及动力学 |
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| 引用本文： | 陈飞雄,李国鹏,周彩荣,彭飞飞.树脂D301M吸附草甘膦的热力学及动力学[J].北京理工大学学报,2012,32(6):650-654. |
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| 作者姓名： | 陈飞雄 李国鹏 周彩荣 彭飞飞 |
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| 作者单位： | 郑州大学化工与能源学院 河南 郑州450001;华南理工大学化学与化工学院 广东 广州510640 |
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| 基金项目： | 河南省科技攻关项目(092102210177) |
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| 摘 要： | 通过静态吸附实验,研究了树脂D301M对草甘膦水溶液的吸附热力学和吸附动力学特性.测定了303.15～318.15K的等温吸附线和吸附动力学数据,并分别用Langmuir,Freundlich,Temkin模型拟合了树脂D301M吸附草甘膦水溶液的实验数据.结果表明,树脂D301M对水溶液中草甘膦的吸附符合Langmuir等温吸附方程,并根据热力学原理,计算出吸附热力学参数,其吸附焓值ΔH=58.42kJ.mol-1,ΔG0,ΔS0.树脂D301M的吸附过程符合准二阶动力学方程;采用Arrhenius方程计算出吸附的表观活化能Ea=165.22kJ.mol-1.
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| 关 键 词： | 草甘膦 吸附 热力学 动力学 |
| 收稿时间： | 2011/10/10 0:00:00 |
Adsorbing Thermodynamics and Kinetics of Resin D301M to Glyphosate Solution |
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| CHEN Fei-xiong,LI Guo-peng,ZHOU Cai-rong and PENG Fei-fei.Adsorbing Thermodynamics and Kinetics of Resin D301M to Glyphosate Solution[J].Journal of Beijing Institute of Technology(Natural Science Edition),2012,32(6):650-654. |
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| Authors: | CHEN Fei-xiong LI Guo-peng ZHOU Cai-rong and PENG Fei-fei |
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| Institution: | 1.School of Chemical Engineering and Energy,Zhengzhou University,Zhengzhou,He’nan 450001,China; 2.School of Chemistry and Chemical Engineering,South China University of Technology, Guangzhou,Guangdong 510640,China) |
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| Abstract: | The adsorbing kinetics and thermodynamics of resin D301M to glyphosate solution were investigated by implementation of state adsorption experiments.The adsorption isotherm and kinetics in the range from 303.15 to 318.15 K were determined.Langmuir,Freundlich,and Temkin isotherm equations were employed to describe the adsorption process and fit the experimental data.The results indicate that the Langmuir isotherm function fits the data better.The parameters of adsorbing thermodynamic,ΔH,ΔG and ΔS were calculated.The kinetics of the resin D301M adsorbing process follows a pseudo-second-order model.It is found that,under low temperature,the diffusion of liquid sheet and chemical reaction are the dominant procedure,but,with the temperature increasing,the ion particle diffusion becomes the dominant procedure gradually.According to the Arrhenius equation,the calculated apparent activation energy is 165.22 kJ·mol-1. |
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| Keywords: | glyphosate adsorption thermodynamics kinetics |
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