title: Cationic cellulose hydrogels cross-linked by poly(ethylene glycol): Preparation, molecular dynamics, and adsorption of anionic dyes.
abstract: Cationic cellulose hydrogels (CCGs) were prepared from quaternized celluloses with degrees of substitution (DS) of 0.56, 0.84, and 1.33, by the cross-linking reaction with poly(ethylene glycol) diglycidyl ether as a cross-linker. The CCGs exhibited swelling behavior in aqueous solutions, which was not affected by pH and temperature of the solution because of the presence of quaternary ammonium groups in their structures. The CCGs showed adsorption ability toward anionic dyes in aqueous solution, which increased with increasing DS. The dye adsorption was found to follow the pseudo-second order kinetic model and the equilibrium isotherm data can be described by the Langmuir adsorption model. In addition, the CCGs could be regenerated and proved to be recyclable adsorbents for wastewater treatment.
authors: National Institute of Technology, Tomakomai College, Nishikioka 443, Tomakomai, Hokkaido 059 1275, Japan. Electronic address: kono@tomakomai-ct.ac.jp.
authors: Hiroyuki
authors: H
authors: Kono
authors: National Institute of Technology, Tomakomai College, Nishikioka 443, Tomakomai, Hokkaido 059 1275, Japan.
authors: Kota
authors: K
authors: Ogasawara
authors: National Institute of Technology, Tomakomai College, Nishikioka 443, Tomakomai, Hokkaido 059 1275, Japan.
authors: Ryo
authors: R
authors: Kusumoto
authors: National Institute of Technology, Tomakomai College, Nishikioka 443, Tomakomai, Hokkaido 059 1275, Japan.
authors: Kazuhiro
authors: K
authors: Oshima
authors: National Institute of Technology, Tomakomai College, Nishikioka 443, Tomakomai, Hokkaido 059 1275, Japan.
authors: Hisaho
authors: H
authors: Hashimoto
authors: National Institute of Technology, Tomakomai College, Nishikioka 443, Tomakomai, Hokkaido 059 1275, Japan.
authors: Yuuichi
authors: Y
authors: Shimizu
mesh_terms: D000327:Adsorption; D002482:Cellulose / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry*; D003432:Cross-Linking Reagents / Q000737:chemistry*; D020100:Hydrogels / Q000737:chemistry*; D007700:Kinetics; D008956:Models, Chemical; D056004:Molecular Dynamics Simulation; D011092:Polyethylene Glycols / Q000737:chemistry*; D062065:Wastewater / Q000737:chemistry; D018508:Water Purification / Q000379:methods
chemical_list: D002482:Cellulose; D004396:Coloring Agents; D003432:Cross-Linking Reagents; D020100:Hydrogels; D011092:Polyethylene Glycols; D062065:Wastewater
keywords: Cationic adsorbent; Cellulose; Dye adsorption; Molecular dynamics; Poly(ethylene glycol)