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题名: Physical and chemical regeneration of zeolitic adsorbents for dye removal in wastewater treatment
作者: Wang, Shaobin;  Li, Huiting;  Xie, Sujuan;  Liu, Shenglin;  Xu, Longya
通讯作者: 徐龙伢
关键词: MCM-22 ;  natural zeolite ;  regeneration ;  dye adsorption ;  kinetics
刊名: CHEMOSPHERE
发表日期: 2006-09-01
DOI: 10.1016/j.chemosphere.2006.03.043
卷: 65, 期:1, 页:82-87
收录类别: SCI
文章类型: Article
部门归属: 8
项目归属: 804
产权排名: 2;3
WOS标题词: Science & Technology ;  Life Sciences & Biomedicine
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
英文摘要: Natural zeolite and synthetic zeolite, MCM-22, were employed as effective adsorbents for a basic dye, methylene blue, removal from wastewater. Two methods, Fenton oxidation and high temperature combustion, have been used for regeneration of used materials. It is found that MCM-22 exhibits equilibrium adsorption at 1.7 x 10(-4) Mol g(-1), much higher than the adsorption of natural zeolite (5 x 10(-5) Mol g(-1)) at initial dye concentration of 2.7 x 10(-5) M and 30 degrees C. Solution pH will affect the adsorption behaviour of MCM-22. Higher solution pH results in higher adsorption capacity. The regenerated adsorbents show different capacity depending on regeneration technique. Physical regeneration by high temperature combustion will be better than chemical regeneration using Fenton oxidation in producing effective adsorbents. Regeneration of MCM-22 by high temperature treatment can make the adsorbent exhibit comparable or superior adsorption capacity as compared to the fresh sample depending on the temperature and time. The optimal temperature and time will be 540 degrees C and 1 h. The Fenton oxidation will recover 60% adsorption capacity. For natural zeolite, regeneration can not fully recover the adsorption capacity with the two techniques and the regenerated natural zeolites by the two techniques are similar, showing 60% adsorption capacity of fresh sample. Kinetic studies indicate that the adsorption follows pseudo-second-order kinetics. (c) 2006 Elsevier Ltd. All rights reserved.
关键词[WOS]: ACTIVATED CARBON ;  METHYLENE-BLUE ;  RED MUD ;  ADSORPTION ;  MCM-22 ;  SORPTION ;  ALKYLATION
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000241015300011
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/98203
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Curtin Univ Technol, Dept Chem Engn, Perth, WA 6845, Australia
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian, Peoples R China

Recommended Citation:
Wang, Shaobin,Li, Huiting,Xie, Sujuan,et al. Physical and chemical regeneration of zeolitic adsorbents for dye removal in wastewater treatment[J]. CHEMOSPHERE,2006,65(1):82-87.
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