Journal of Radioanalytical and Nuclear Chemistry
Volume/Issue:
Volume 292: Issue 3
Efficient uranium(VI) biosorption on grapefruit peel: kinetic study and thermodynamic parameters
Authors:
Wei Zou School of Chemical Engineering and Energy, Zhengzhou University, 100# of Kexue Road, 450001 Zhengzhou, People’s Republic of China

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Lei Zhao School of Chemical Engineering and Energy, Zhengzhou University, 100# of Kexue Road, 450001 Zhengzhou, People’s Republic of China

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Lu Zhu Department of Chemistry, Zhengzhou University, 100# of Kexue Road, 450001 Zhengzhou, People’s Republic of China

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Pages:
1303–1315
Online Publication Date:
04 Jan 2012
Publication Date:
01 Jun 2012
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10967-011-1602-0
Keywords:
Biosorption; Grapefruit peel; Uranium (VI); Kinetics; Equilibrium; Mechanisms
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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 Di and Df values were estimated at different initial concentration and the average values were determined to be 1.167 × 10−7 and 4.078 × 10−8 cm2 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 NH2 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.

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Cover Journal of Radioanalytical and Nuclear Chemistry
Journal of Radioanalytical and Nuclear Chemistry
Print ISSN:
0236-5731
Online ISSN:
1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation		 1968
Volumes
per Year		 1
Issues
per Year		 12
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)

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