On adsorption and diffusion behaviors of p-chloronitrobenzene in HZSM-5 zeolite

doi:10.11894/1005-829x.2007.27(7).45

INDUSTRIAL WATER TREATMENT ›› 2007, Vol. 27 ›› Issue (7): 45-47,63. doi: 10.11894/1005-829x.2007.27(7).45

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On adsorption and diffusion behaviors of p-chloronitrobenzene in HZSM-5 zeolite

Guo Zhaobing¹, Zheng Shourong², Zheng Zheng², Zheng Youfei¹

1. School of Environmental Science & Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China;
2. School of Environment, Nanjing University, Nanjing 210093, China

Received:2007-01-20 Revised:2007-01-20 Online:2007-07-20 Published:2010-10-01

对硝基氯苯在HZSM-5沸石中的吸附和扩散行为研究

郭照冰¹, 郑寿荣², 郑正², 郑有飞¹

1. 南京信息工程大学环境科学与工程学院, 江苏南京210044;
2. 南京大学环境学院, 江苏南京 210093

作者简介:郭照冰(1972- ),2005年毕业于南京大学环境学院, 博士,讲师.电话:025-57731090,E-mail:guozbnu its@163.com.
基金资助:
国家自然科学基金项目(10275034);南京信息工程大学科研启动基金项目(QD054)

Abstract

Abstract:

Adsorption and diffusion behaviors of p-chloronitrobenzene(p-CNB)in aqueous solution using HZSM-5 zeolite as the sorbent have been studied through static adsorption experiments.It is observed that the adsorption isotherms for p-CNB in HZSM-5 zeolite present two-step curves and the maximum adsorption amounts are independent of the temperatures.In addition,it's also found that p-CNB molecule is preferentially adsorbed in the intersections of HZSM-5 zeolite channels and internal diffusion is a crucial factor controlling the diffusion of p-CNB in the zeolite.Diffusion results reveal that the diffusivity of p-CNB in HZSM-5 zeolite is markedly reliant on the temperature and the adsorbed amount of p-CNB molecule,high adsorption temperature and low adsorption amount is helpful to the diffusion of p-CNB in HZSM-5 zeolite.

摘要：

通过静态吸附实验,研究水体中对硝基氯苯在HZSM-5沸石中的吸附和扩散行为。研究结果表明,对硝基氯苯在HZSM-5沸石中的吸附等温线存在2个平台,其最大吸附量与温度无关。对硝基氯苯优先吸附在沸石孔道的交点位置,其吸附过程由内扩散控制。对硝基氯苯在HZSM-5沸石中的扩散性与温度和对硝基氯苯的吸附量密切相关,其扩散系数在高温与吸附量小于2mol/u.c.时较高。

关键词: 对硝基氯苯, HZSM-5沸石, 吸附, 扩散

CLC Number:

X703

Guo Zhaobing, Zheng Shourong, Zheng Zheng, Zheng Youfei. On adsorption and diffusion behaviors of p-chloronitrobenzene in HZSM-5 zeolite[J]. INDUSTRIAL WATER TREATMENT, 2007, 27(7): 45-47,63.

郭照冰, 郑寿荣, 郑正, 郑有飞. 对硝基氯苯在HZSM-5沸石中的吸附和扩散行为研究[J]. 工业水处理, 2007, 27(7): 45-47,63.

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On adsorption and diffusion behaviors of p-chloronitrobenzene in HZSM-5 zeolite

对硝基氯苯在HZSM-5沸石中的吸附和扩散行为研究

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On adsorption and diffusion behaviors of p-chloronitrobenzene in HZSM-5 zeolite

对硝基氯苯在HZSM-5沸石中的吸附和扩散行为研究

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