title: Synthesis and characterization of poly(carboxymethyl)-cellulose for enhanced La(III) sorption.
abstract: The grafting of amino and carboxylic acid groups on cellulose increased La(III) sorption efficiency of cellulose: maximum sorption capacity increased from 38mgLag-1for cellulose to 101 and 170mgLag-1for amino derivative (PAC) and amino-carboxylic derivative (PCMC). Langmuir equation successfully fits sorption isotherms while uptake kinetics are effectively modeled using the pseudo-first order rate equation (though resistance to intraparticle diffusion plays a significant role in the control of metal recovery). Uptake equilibrium occurred within 150-180min. The thermodynamic study shows that the reaction is spontaneous, endothermic and entropic. Nitric acid solutions (0.5M concentration) can be efficiently used for metal recovery and sorbent can be recycled for at least 5 cycles with limited decrease in sorption performance for the three sorbents. The materials were characterized by elemental analysis, acid-base titration, FTIR spectrometry, x-ray diffraction analysis, X-ray photoelectron spectroscopy, SEM-EDX analysis and also by TGA.
authors.affiliation: Nuclear Materials Authority, P.O. Box 530, El-Maadi, Cairo, Egypt. Electronic address: ibn_ata@yahoo.com.
authors.forename: Ahmad A
authors.initials: AA
authors.lastname: Tolba
authors.affiliation: Nuclear Materials Authority, P.O. Box 530, El-Maadi, Cairo, Egypt. Electronic address: said_mohamady75@yahoo.com.
authors.forename: Said I
authors.initials: SI
authors.lastname: Mohamady
authors.affiliation: Nuclear Materials Authority, P.O. Box 530, El-Maadi, Cairo, Egypt. Electronic address: mash_1997@yahoo.com.
authors.forename: Shimaa S
authors.initials: SS
authors.lastname: Hussin
authors.affiliation: Hosei University, Faculty of Bioscience and Applied Chemistry, Japan. Electronic address: akashi@hosei.ac.jp.
authors.forename: Takaya
authors.initials: T
authors.lastname: Akashi
authors.affiliation: Hosei University, Faculty of Bioscience and Applied Chemistry, Japan. Electronic address: yukaji_sakai1@yahoo.co.jp.
authors.forename: Yuka
authors.initials: Y
authors.lastname: Sakai
authors.affiliation: Nuclear Materials Authority, P.O. Box 530, El-Maadi, Cairo, Egypt; Hosei University, Faculty of Bioscience and Applied Chemistry, Japan; Ecole des mines d'Alès, Centre des Matériaux des Mines d'Alès, 6, Avenue de Clavières, F-30319 Alès Cedex, France. Electronic address: Galhoum_nma@yahoo.com.
authors.forename: Ahmed A
authors.initials: AA
authors.lastname: Galhoum
authors.affiliation: Ecole des mines d'Alès, Centre des Matériaux des Mines d'Alès, 6, Avenue de Clavières, F-30319 Alès Cedex, France. Electronic address: eric.guibal@mines-ales.fr.
authors.forename: Eric
authors.initials: E
authors.lastname: Guibal
keywords: Cellulose; Desorption; FTIR; Lanthanum sorption; Poly(carboxymethylation) of cellulose; Polyaminated cellulose; SEM; Sorption isotherms; TGA; Thermodynamics; Uptake kinetics; XRD