| 凹凸棒石对水中3,4-二氯苯胺的吸附 |
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| 引用本文： | 冯景伟,张曼君,郑正,孙亚兵,李坤权.凹凸棒石对水中3,4-二氯苯胺的吸附[J].环境化学,2009,28(3). |
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| 作者姓名： | 冯景伟 张曼君 郑正 孙亚兵 李坤权 |
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| 作者单位： | 污染控制与资源化研究国家重点实验室,南京大学环境学院,南京,210093 |
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| 基金项目： | 上海同济高廷耀环保科技发展基金，南京大学优秀博士学位论文培育基金 |
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| 摘 要： | 研究了凹凸棒石对水中3,4-二氯苯胺(3,4-DCA)的吸附行为,对不同温度下(298K,303K,313K)的数据分别用Langmuir,Freundlich和Redlich-Peterson模式进行拟合,并用假一级方程和假二级方程描述凹凸棒石对3,4-DCA的吸附动力学过程,结果表明:吸附作用受pH值影响明显,在pH=4.O时,吸附量最大;凹凸棒石的吸附能力随着温度的升高而降低;Redlich-Peterson方程更适合描述3,4-DCA在凹凸棒石上的吸附行为;Gibbs自由能(△G0)、熵变(△S0)和焓变(△H0)值均小于零,说明此吸附过程是自发进行的、放热的物理吸附过程;假二级方程更适用于描述凹凸棒石对3,4-DCA的吸附动力学过程,
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| 关 键 词： | 凹凸棒石 3 4-二氯苯胺 吸附. |
ADSORPTION OF 3,4-DICHLOROANILINE ONTO ATTAPULGITE CLAY |
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| FENG Jing-wei,ZHANG Man-jun,ZHENG Zheng,SUN Ya-bing,Li Kun-quan.ADSORPTION OF 3,4-DICHLOROANILINE ONTO ATTAPULGITE CLAY[J].Environmental Chemistry,2009,28(3). |
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| Authors: | FENG Jing-wei ZHANG Man-jun ZHENG Zheng SUN Ya-bing Li Kun-quan |
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| Institution: | State Key Laboratory of Pollution Control and Resource Reuse;School of the Environment;Nanjing University;Nanjing;210093;China |
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| Abstract: | Adsorption of 3,4-dichloroaniline (3,4-DCA) onto attapulgite clay was conducted in the present article. The equilibrium data were fitted with the Langmuir, Freundlich and Redlich-Peterson models to describe the equilibrium isotherms. The kinetics rates were modeled using pseudo-first-order and pseudo-second-order kinetic equations. The results showed that adsorption of 3,4-DCA onto attapulgite clay was affected remarkably by the pH value and the maximum adsorption amount was achieved at an optimum pH of 4.0... |
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| Keywords: | attapulgite clay 3 4-DCA adsorption |
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