Cysteine-Functionalized Chitosan Magnetic Nano-Based Particles for the Recovery of Light and Heavy Rare Earth Metals: Uptake Kinetics and Sorption Isotherms

Nanomaterials

Ahmed A. Galhoum³  Mohammad G. Mafhouz⁴  Sayed T. Abdel-Rehem¹  Nabawia A. Gomaa⁴  Asem A. Atia²  Thierry Vincent⁴  Eric Guibal⁴ 

[1] Chemistry Department, Faculty of Science, Ain Shams University, P.O. Box 11566 Ain Shams, Egypt; E-Mail:;Chemistry Department, Faculty of Science, Menoufia University, P.O. Box 32511 Shebin El-Kom, Egypt; E-Mail:;Ecole des mines d’Alès, Centre des Matériaux des Mines d’Alès, 6 avenue de Clavières, F-30319 Alès cedex, France;Nuclear Materials Authority, P.O. Box 530, El-Maadi, Cairo, Egypt; E-Mails:

关键词: cysteine-grafting;    rare earth metals;    magnetic chitosan nanocomposites;    sorption isotherms;    uptake kinetics;    thermodynamics;   

DOI  :  10.3390/nano5010154

来源: mdpi

【 摘 要 】

Cysteine-functionalized chitosan magnetic nano-based particles were synthesized for the sorption of light and heavy rare earth (RE) metal ions (La(III), Nd(III) and Yb(III)). The structural, surface, and magnetic properties of nano-sized sorbent were investigated by elemental analysis, FTIR, XRD, TEM and VSM (vibrating sample magnetometry). Experimental data show that the pseudo second-order rate equation fits the kinetic profiles well, while sorption isotherms are described by the Langmuir model. Thermodynamic constants (ΔG°, ΔH°) demonstrate the spontaneous and endothermic nature of sorption. Yb(III) (heavy RE) was selectively sorbed while light RE metal ions La(III) and Nd(III) were concentrated/enriched in the solution. Cationic species RE(III) in aqueous solution can be adsorbed by the combination of chelating and anion-exchange mechanisms. The sorbent can be efficiently regenerated using acidified thiourea.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.