US EPA

3730746 

Journal Article 

Amino Acid Functionalized Chitosan Magnetic Nanobased Particles for Uranyl Sorption 

Galhoum, AA; Mahfouz, MG; Atia, AA; Abdel-Rehem, ST; Gomaa, NA; Vincent, T; Guibal, E 

2015 

Yes 

Industrial and Engineering Chemistry Research
ISSN: 0888-5885
EISSN: 1520-5045 

54 

49 

12374-12385 

10.1021/acs.iecr.5b03331 

WOS:000366878100016 

Nanobased magnetic particles are synthesized by a one-pot hydrothermal precipitation of chitosan in the presence of iron(II) and iron(III) salts. The material is then chemically modified by grafting alanine and serine amino acids. These materials are Characterized by elemental analysis, FTIR spectrometry, XRD analysis, TEM observations and VSM (vibrating sample magnetometry). In a second step, these materials are tested for uranium(VI) sorption. The effect of pH on sorption performance is first investigated before evaluating uptake kinetics (which are fitted by the pseudo-second-order rate equation)and sorption: isotherms (which are modeled by the Langmuir equation). Metal desorption and sorbent recycling are finally carried out for five successive cycles of sorption/desorption. Thermo-dynamic parameters are determined by investigating. sorption properties at different temperatures. Maximum sorption capacities reach 85 and 116 mg U g(-1) for alanine- and serine-based sorbents; respectively. The magnetic properties of the particles allow their efficient separation from the solution by external magnetic field.