Adsorption of phenol, p-chlorophenol and p-nitrophenol onto functional chitosan

被引：192
|
作者：
Li, Jian-Mei [1 ]
Meng, Xiang-Guang [1 ]
Hu, Chang-Wei [1 ]
Du, Juan [1 ]
机构：
[1] Sichuan Univ, Coll Chem, Minist Educ, Key Lab Green Chem & Technol, Chengdu 610064, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2009年 / 100卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Chitosan; beta-Cyclodextrin; Phenols; Adsorption; Wastewater; BETA-CYCLODEXTRIN; ACTIVATED CARBON; AQUEOUS-SOLUTION; SCHIFF-BASES; SORPTION; ADSORBENT; REMOVAL; WATER; SALICYLALDEHYDE; EQUILIBRIUM;
D O I：
10.1016/j.biortech.2008.09.015
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
Functional chitosan, chemically modified by salicylaldehyde (CS-SA), beta-cyclodextrin (CS-CD), and a crosslinked beta-cyclodextrin polymer (EPI-CD) were prepared as adsorbents to remove phenol, p-nitrophenol and p-chlorophenol from aqueous solution. Langmuir and Freundlich models were applied to describe the adsorption isotherm of phenols, and adsorption parameters were evaluated. Functional chitosan displayed outstanding adsorption ability for phenols. To our surprise, CS-CD exhibited specific adsorption ability for p-chlorophenol. The possible adsorption interaction was discussed. Effects of pH and KCI on the adsorption suggested that the adsorption of phenols was predominated by hydrogen bonding, hydrophobic interaction and pi-pi interaction not electrostatic interaction. Effect of temperature indicated that the low temperature was favorable for the adsorption of phenols. Separation of phenols and adsorbent regeneration were carried out by simple washing with ethanol and filtrating. (c) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1168 / 1173
页数：6
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