%0 Journal Article %T Uranium (VI) Sorption Using Functionalized-Chitosan Magnetic Nanobased Particles %+ Nuclear Materials Authority [Le Caire] %+ Centre des Matériaux des Mines d'Alès (C2MA) %A Galhoum, Ahmed %A Mahfouz, Mohammad %A Gomaa, Nabawia %A Thierry, Vincent %A Guibal, Eric %< avec comité de lecture %@ 1022-6680 %J Advanced Materials Research %I Trans Tech Publications %V 1130 %P 499-502 %8 2015-11 %D 2015 %R 10.4028/www.scientific.net/AMR.1130.499 %K Chitosan Derivative %K Magnetic %K Nanoparticles %K Sorption %K Uranium %Z Engineering Sciences [physics]Journal articles %X Hybrid materials were synthesized by chemical grafting of different compounds (diethylenetriamine DETA, cysteine, alanine and serine) on chitosan/magnetite nanoparticles. The sorbents were characterized by TEM, XRD and FTIR analysis and vibrating sample magnetometry (VSM) before being tested for uranium sorption. The nanometric size of sorbent particles reduces the impact of diffusion resistance and uptake kinetics are quite fast. Sorption isotherms are modeled by the Langmuir equation. The sorption is spontaneous and exothermic. Uranium is desorbed using acidic thiourea and the sorbent can be recycled for at least 4/5 cycles. %G English %L hal-02915419 %U https://imt-mines-ales.hal.science/hal-02915419 %~ INSTITUT-TELECOM %~ EM-ALES %~ INSTITUTS-TELECOM %~ TEST3-HALCNRS