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

作者：Li, Jian-Mei; Meng, Xiang-Guang^*; Hu, Chang-Wei; Du, Juan

来源：Bioresource Technology, 2009, 100(3): 1168-1173.

DOI：10.1016/j.biortech.2008.09.015

• Chitosan
• beta-Cyclodextrin
• Phenols
• Adsorption
• Wastewater

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.

• 出版日期2009-2
• 单位四川大学