NDLI: Efficient uranium(VI) biosorption on grapefruit peel: kinetic study and thermodynamic parameters

Content Provider	Springer Nature Link
Author	Zou, Wei Hua Zhao, Lei Zhu, Lu
Copyright Year	2012
Abstract	The uranium(VI) biosorption by grapefruit peel was studied from aqueous solutions. Batch experiments was conducted to evaluate the effect of contact time, initial uranium(VI) concentration, initial pH, adsorbent dose, salt concentration and temperature. The equilibrium process was well described by the Langmuir, Redlich–Peterson and Koble–Corrigan isotherm models, with maximum sorption capacity of 140.79 mg g$^{−1}$ at 298 K. The pseudo second order model and Elovish model adequately describe the kinetic data in comparison to the pseudo first order model and the process involving rate-controlling step is much complex involving both boundary layer and intra-particle diffusion processes. The effective diffusion parameter D $_{i}$ and D $_{f}$ values were estimated at different initial concentration and the average values were determined to be 1.167 × 10$^{−7}$ and 4.078 × 10$^{−8}$ cm$^{2}$ s$^{−1}$. Thermodynamic parameters showed that the biosorption of uranium(VI) onto grapefruit peel biomass was feasible, spontaneous and endothermic under studied conditions. The physical and chemical properties of the adsorbent were determined by SEM, TG-DSC, XRD and elemental analysis and the nature of biomass–uranium (VI) interactions was evaluated by FTIR analysis, which showed the participation of COOH, OH and NH$_{2}$ groups in the biosorption process. Adsorbents could be regenerated using 0.05 mol L$^{−1}$ HCl solution at least three cycles, with up to 80% recovery. Thus, the biomass used in this work proved to be effective materials for the treatment of uranium (VI) bearing aqueous solutions.
Starting Page	1303
Ending Page	1315
Page Count	13
File Format	PDF
ISSN	02365731
Journal	Journal of Radioanalytical and Nuclear Chemistry
Volume Number	292
Issue Number	3
e-ISSN	15882780
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-01-04
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biosorption Grapefruit peel Uranium (VI) Kinetics Equilibrium Mechanisms Inorganic Chemistry Physical Chemistry Nuclear Physics, Heavy Ions, Hadrons Nuclear Chemistry Diagnostic Radiology
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Pollution Health, Toxicology and Mutagenesis Radiology, Nuclear Medicine and Imaging Analytical Chemistry Public Health, Environmental and Occupational Health Nuclear Energy and Engineering

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