title: Removal of metal ions from aqueous solutions using carboxymethyl cellulose/sodium styrene sulfonate gels prepared by radiation grafting.
abstract: Sodium Carboxymethyl Cellulose (CMCNa)/Sodium Styrene Sulfonate (SSS) hydrogels with grafted and crosslinked polymeric networks were prepared by γ-radiation at atmosphere condition. The obtained hydrogels were characterized by gel fraction, swelling ratio, TGA and FTIR spectroscopy. The results showed the ratio of CMC and SSS 1:0 gave the highest gel fraction, compared with other ratios. The swelling capacity increased by increasing SSS content due to the presence of SO3Na, OH groups in gel structure. The FTIR spectrum of CMC/SSS gel showed the new absorption peaks at 1034 and 1012cm-1corresponds to SO3Na group. The metal ion adsorption capacity of CMC/SSS gel was investigated. The grafted gel effectively removed metal ions, especially Cr and Pb. The effects of hydrogel composition, contact time, and initial concentration on the adsorption capacity of the grafted hydrogels were studied. The adsorption kinetics and equilibrium isotherms were investigated using pseudo-second-order model and Langmuir model.
authors.affiliation: Department of Applied Quantum Physics and Nuclear Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan; Nuclear Research Institute, Vietnam Atomic Energy Institute (VINATOM), 01 Nguyen Tu Luc, Dalat, Lam Dong, Vietnam. Electronic address: hong@athena.ap.kyushu-u-ac.jp.
authors.forename: Thu Hong
authors.initials: TH
authors.lastname: Tran
authors.affiliation: Department of Applied Quantum Physics and Nuclear Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan.
authors.forename: Hirotaka
authors.initials: H
authors.lastname: Okabe
authors.affiliation: Department of Applied Quantum Physics and Nuclear Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan.
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Hidaka
authors.affiliation: Department of Applied Quantum Physics and Nuclear Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan.
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Hara
mesh_terms: D000327:Adsorption; D002266:Carboxymethylcellulose Sodium / Q000737:chemistry*; D002623:Chemistry Techniques, Analytical / Q000379:methods*; D005782:Gels / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007477:Ions / Q000302:isolation & purification*; D007700:Kinetics; D008670:Metals / Q000302:isolation & purification*; D020058:Styrene / Q000737:chemistry*
chemical_list: D005782:Gels; D007477:Ions; D008670:Metals; D020058:Styrene; D002266:Carboxymethylcellulose Sodium
keywords: Carboxymethyl cellulose; Grafting; Hydrogel; Metal adsorption; Sodium styrene sulfonate; γ-Radiation