| MFI型沸石吸附分离水体中混合硝基氯苯的研究 |
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| 引用本文： | 郭照冰,郑寿荣,郑正,江芳,陈立强,王艳锦.MFI型沸石吸附分离水体中混合硝基氯苯的研究[J].环境科学学报,2005,25(6):773-778. |
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| 作者姓名： | 郭照冰 郑寿荣 郑正 江芳 陈立强 王艳锦 |
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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;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;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;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;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;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： | 国家自然科学基金 (No .10 2 75 0 3 4)~~ |
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| 摘 要： | 采用MFI型沸石(HZSM-5与Silicalite-1沸石)为吸附剂分别吸附水体中的对硝基氯苯和邻硝基氯苯，研究了温度与沸石的结构特性对硝基氯苯吸附的影响，以及2种硝基氯苯分子在MFI型沸石中的扩散行为．结果表明，在不同温度下，对硝基氯苯与邻硝基氯苯在HZSM-5与Silicalite-1沸石中的吸附行为明显不同；对硝基氯苯在2种MFI型沸石中的扩散系数都显高于邻硝基氯苯．对硝基氯苯与邻硝基氯苯在吸附量与扩散性上的差异导致HZSM-5与Silicalite-1沸石对对硝基氯苯的吸附具有良好的选择性．尤其HZSM-5沸石在低温下更有利于从水体中选择性吸附分离混合硝基氯苯。
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| 关 键 词： | 硝基氯苯 沸石 吸附 扩散 分离 |
| 文章编号： | 0253-2468(2005)06-0773-06 |
| 收稿时间： | 2004/9/17 0:00:00 |
| 修稿时间： | 2004年9月17日 |
Study on adsorption and separation of chloronitrobenzene mixtures in aqueous phase using MFI-type zeolite |
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| GUO Zhaobing,ZHENG Shourong,ZHENG Zheng,JIANG Fang,CHEN Liqiang and WANG Yanjin.Study on adsorption and separation of chloronitrobenzene mixtures in aqueous phase using MFI-type zeolite[J].Acta Scientiae Circumstantiae,2005,25(6):773-778. |
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| Authors: | GUO Zhaobing ZHENG Shourong ZHENG Zheng JIANG Fang CHEN Liqiang and WANG Yanjin |
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| Institution: | State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210093,State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210093,State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210093,State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210093,State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210093 and State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210093 |
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| Abstract: | The adsorption of p-chloronitrobenzene (p-CNB) and o-chloronitrobenzene (o-CNB) in the wastewater was investigated using MFI-type zeolites (HZSM-5 and Silicalite-1 zeolites) as the adsorbents. The influences of the properties of zeolite and the adsorption temperature on the adsorption of CNBs were studied. Meanwhile, the diffusivities of p-CNB and o-CNB in HZSM-5 and Silicalite-1 zeolites were examined. It was found the adsorption behaviors of p-CNB in HZSM-5 and Silicalite-1 zeolites were markedly different from those of o-CNB, and the diffusion coefficients of p-CNB in the two zeolites were markedly higher, compared to those of o-CNB at the adsorption temperatures. The remarkable difference in the adsorption amounts and diffusivities between p-CNB and o-CNB led to a selective adsorption of p-CNB. Furthermore, a more efficient recovery of p-CNB from the mixture of p- and o-CNB could be achieved in HZSM-5 zeolite at lower adsorption temperature. |
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| Keywords: | chloronitrobenzene zeolite adsorption diffusion separation |
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