کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
686105 889062 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Adsorption of phenol, p-chlorophenol and p-nitrophenol onto functional chitosan
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Adsorption of phenol, p-chlorophenol and p-nitrophenol onto functional chitosan
چکیده انگلیسی

Functional chitosan, chemically modified by salicylaldehyde (CS-SA), β-cyclodextrin (CS-CD), and a cross-linked β-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 KCl on the adsorption suggested that the adsorption of phenols was predominated by hydrogen bonding, hydrophobic interaction and π–π 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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 100, Issue 3, February 2009, Pages 1168–1173
نویسندگان
, , , ,