title: Fast removal of uranium from aqueous solutions using tetraethylenepentamine modified magnetic chitosan resin.
abstract: Chitosan was cross-linked using glutaraldehyde in the presence of magnetite. The resin was chemically modified through the reaction with tetraethylenepentamine (TEPA) to produce amine bearing chitosan. The resin showed a higher affinity towards the uptake of UO2(2+) ions from aqueous medium: maximum sorption capacity reached 1.8 mmol g(-1) at pH 4 and 25 °C. The nature of interaction of UO2(2+) ions with the resin was identified. Kinetics were carried out at different temperatures and thermodynamic parameters were evaluated. Breakthrough curves for the removal of UO2(2+) were studied at different flow rates, bed heights and after 3 regeneration cycles. Hydrochloric acid (0.5 M) was used for desorbing UO2(2+) from loaded resin: desorption yield as high as 98% was obtained.
authors: Environmental Science Department, Faculty of Science, Port-Said University, Port-Said, Egypt.
authors: Khalid Z
authors: KZ
authors: Elwakeel
authors: Chemistry Department, Faculty of Science, Menofia University, Menofia, Egypt.
authors: Asem A
authors: AA
authors: Atia
authors: Ecole des mines d'Alès, Centre des Matériaux des Mines d'Alès, C2MA/MPA/BCI, 6, avenue de Clavières, F-30319 Alès cedex, France. Electronic address: Eric.Guibal@mines-ales.fr.
authors: Eric
authors: E
authors: Guibal
mesh_terms: D000327:Adsorption; D048271:Chitosan / Q000737:chemistry*; D005029:Ethylenediamines / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D060328:Magnetic Phenomena; D009994:Osmolar Concentration; D012117:Resins, Synthetic / Q000737:chemistry*; D012212:Rheology; D013696:Temperature; D013997:Time Factors; D014501:Uranium / Q000302:isolation & purification*; D014875:Water Pollutants, Radioactive / Q000302:isolation & purification*
chemical_list: D005029:Ethylenediamines; D012117:Resins, Synthetic; D014875:Water Pollutants, Radioactive; D014501:Uranium; D048271:Chitosan; C034269:tetraethylenepentamine
keywords: Chitosan derivative; Ferromagnetic sorbent; Kinetics; Thermodynamics; Uranyl ion removal