title: Adsorption properties of crosslinking carboxymethyl cellulose grafting dimethyldiallylammonium chloride for cationic and anionic dyes.
abstract: Novel and efficient microspheres adsorbent (MCA-E0.7/CMC-g- PDMDAAC), based on monochloroacetic acid (MCA) modified epichlorohydrin (ECH) cross-linked carboxymethyl cellulose (CMC), then grafting by dimethyldiallylammonium chloride (DMDAAC), was synthesized and its adsorption properties on cationic and anionic dyes were investigated. The results demonstrated that such MCA-E0.7/CMC-g-PDMDAAC microspheres showed pH-sensitive and could effectively adsorb cationic dye methylene blue (MB) or anionic dye orange II (OR II), at near neutral (pH>4) or acidic (pH<3) condition, respectively. Moreover, it could selectively adsorb the cationic dye MB from the cationic/anionic dye mixture at neutral pH condition. The desorption experiments were mainly performed under acidic (pH 3) or basic (pH 11) condition, over 98.54% of MB and 83.07% of OR II can be desorbed within 20min, respectively. The pseudo-second-order kinetic model and Langmuir isotherm provide better correlation with the experimental data for the adsorption of dyes onto MCA-E0.7/CMC-g-PDMDAAC microspheres.
authors.affiliation: School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, Shaanxi 710119, People's Republic of China.
authors.forename: Qingwen
authors.initials: Q
authors.lastname: Lin
authors.affiliation: School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, Shaanxi 710119, People's Republic of China.
authors.forename: Mengfan
authors.initials: M
authors.lastname: Gao
authors.affiliation: School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, Shaanxi 710119, People's Republic of China.
authors.forename: Jiali
authors.initials: J
authors.lastname: Chang
authors.affiliation: School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, Shaanxi 710119, People's Republic of China. Electronic address: hzmachem@snnu.edu.cn.
authors.forename: Hongzhu
authors.initials: H
authors.lastname: Ma
mesh_terms: D000327:Adsorption; D000838:Anions / Q000737:chemistry; D001391:Azo Compounds / Q000737:chemistry*; D001557:Benzenesulfonates / Q000737:chemistry*; D002266:Carboxymethylcellulose Sodium; D002412:Cations / Q000737:chemistry; D004396:Coloring Agents / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008751:Methylene Blue / Q000737:chemistry*; D008863:Microspheres; D011095:Polyethylenes; D000644:Quaternary Ammonium Compounds; D014874:Water Pollutants, Chemical / Q000737:chemistry
chemical_list: D000838:Anions; D001391:Azo Compounds; D001557:Benzenesulfonates; D002412:Cations; D004396:Coloring Agents; D011095:Polyethylenes; D000644:Quaternary Ammonium Compounds; D014874:Water Pollutants, Chemical; C041004:poly-N,N-dimethyl-N,N-diallylammonium chloride; D002266:Carboxymethylcellulose Sodium; C014722:2-naphthol orange; D008751:Methylene Blue
keywords: Carboxymethyl cellulose; Dimethyldiallylammonium chloride; Dyes; Selective adsorption; pH-sensitive