对硝基苯酚在镁铝型双金属氢氧化物及其煅烧产物上的吸附

对硝基苯酚在镁铝型双金属氢氧化物及其煅烧产物上的吸附

张树芹¹，侯万国¹^,^2*,王文兴²

1.山东大学胶体与界面化学教育部重点实验室，山东济南 250100；2. 山东大学环境研究院，山东济南 250100

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2006-10-24 发布日期:2006-10-24
通讯作者: 张树芹

Sorption removal of p-nitrophenol by uncalcined and calcined Mg2Al layered double hydroxides

ZHANG Shu-qin¹，HOU Wan-guo¹^,^2*,WANG Wen-xing²

1. Key Laboratory for Colloid & Interface Chemistry of Education Ministry， Shandong University，Jinan 250100;2. Environment Research Institute， Shandong University， Jinan 250100， Shandong

Received:1900-01-01 Revised:1900-01-01 Online:2006-10-24 Published:2006-10-24
Contact: ZHANG Shu-qin

摘要/Abstract

摘要： 对合成的Mg2Al型层状双金属氢氧化物(LDH)及其煅烧产物(CLDH)进行了表征. 研究了对硝基苯酚在LDH和CLDH上的吸附. 结果表明，对硝基苯酚在LDH和CLDH上均可发生吸附，其吸附等温线均符合Freundlich等温式；在LDH上的吸附动力学符合双常数方程，而在CLDH上的吸附动力学符合准一级动力学速率方程和Elovich方程；在CLDH上的吸附速率和吸附量明显高于LDH. 初始pH在3～10范围内变化对吸附量的影响不大，但有先增大后降低的趋势,温度升高，吸附量增大. 讨论了吸附机理.研究结果表明，CLDH有望成为一种新型的高效酚类有机污染物处理剂.

关键词: 层状双金属氢氧化物, 对硝基苯酚, 结构重建 , 吸附

Abstract: The synthesized Mg2Al layered double hydroxide (LDH) and its calcined product (CLDH) were characterized. The sorption removal of p-nitrophenol from solution by LDH and CLDH were investigated. The results show that p-nitrophenol can be adsorbed on both LDH and CLDH, adsorption isotherms can be fitted with the Freundlich equation, and the sorption kinetics of p-nitrophenol on LDH can be well described by the two-constant equation while the sorption kinetics of p-nitrophenol on CLDH can be well described by pseudo-first-order kinetics and the Elovich equation. The sorption rate and sorption amount of p-nitrophenol on the CLDH is higher than that on the LDH at the same equilibrium p-nitrophenol concentration. In the initial pH range of 3～10, the sorption amount displayed the tendency of an initial increase and then a decrease with the initial pH increasing. With an increase of temperature, the sorption amount increases with increasing temperature. The sorption mechanism of p-nitrophenol on the LDH and the CLDH was discussed. The CLDH will be a new kind of highly effective adsorbent for phenols pollution.

Key words: structure reconstruction , adsorption, p-nitrophenol, layered double hydroxide

中图分类号:

O647.31+4

张树芹,侯万国,*,王文兴 . 对硝基苯酚在镁铝型双金属氢氧化物及其煅烧产物上的吸附[J]. J4, 2007, 42(9): 19-24 .

ZHANG Shu-qin,HOU Wan-guo,*,WANG Wen-xing . Sorption removal of p-nitrophenol by uncalcined and calcined Mg2Al layered double hydroxides[J]. J4, 2007, 42(9): 19-24 .

参考文献

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