Authors:
Weihua Zou School of Chemical Engineering and Energy, Zhengzhou University, No. 100 of Kexue Road, Zhengzhou, 450001 Henan Province, People’s Republic of China

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Hongjuan Bai School of Chemical Engineering and Energy, Zhengzhou University, No. 100 of Kexue Road, Zhengzhou, 450001 Henan Province, People’s Republic of China

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Lei Zhao School of Chemical Engineering and Energy, Zhengzhou University, No. 100 of Kexue Road, Zhengzhou, 450001 Henan Province, People’s Republic of China

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Ke Li School of Chemical Engineering and Energy, Zhengzhou University, No. 100 of Kexue Road, Zhengzhou, 450001 Henan Province, People’s Republic of China

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Runping Han Department of Chemistry, Zhengzhou University, No. 100 of Kexue Road, Zhengzhou, 450001 Henan Province, People’s Republic of China

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Abstract  

A continuous fixed-bed study was carried out by using zeolite as a low-cost adsorbent for the removal of uranium(VI) ions from aqueous solution under the effect of various process parameters such as the pH the bed depth, the flow rate, the presence of salt and the initial U(VI) ion concentration. The U(VI) ion uptake by zeolite increased with initial U(VI) ion concentration and bed height, but decreased as the flow rate increased. The adsorption capacity reached a maximum at pH of 6.0. A shorter breakthrough time was observed in the presence of salt. The experimental data obtained from the breakthrough curves were analyzed using the Thomas model. The BDST model was also applied to predict the service times for other flow rates and initial concentrations. The results showed that the Thomas model was suitable for the description of the whole breakthrough curve, while the data were in good agreement with the BDST model. The columns were regenerated by eluting the bound U(VI) ions with 0.1 mol L−1 NaHCO3 solution after the adsorption studies. After desorption and regeneration with deionized water, zeolite could be reused to adsorb uranium(VI) at a comparable capacity.

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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)