Work

Cysteine-Functionalized Chitosan Magnetic Nano-Based Particles for the Recovery of Uranium(VI): Uptake Kinetics and Sorption Isotherms

Year: 2015

Type: article

Abstract: Magnetic-chitosan nanoparticles, functionalized with cysteine, were synthesized and characterized by element analysis, FT-IR, XRD, TEM, and vibrating sample magnetometry. The sorbent was tested for U(VI) recovery, considering: a. pH effect, b. sorption isotherms (fitted by Langmuir equation), and c. uptake kinetics (modeled using the PSORE). Maximum sorption capacity approached 100 mg U g(-1). The nanometric size of sorbent reduces the impact of resistance to intraparticle diffusion; this may explain the fast kinetics (equilibrium within 50 min). The reaction is exothermic, spontaneous. The metal could be desorbed using acidified urea solution and the sorbent could be recycled for 5 cycles.

Source: Separation Science and Technology

DOI: 10.1080/01496395.2015.1085405