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Equilibrium, kinetic and thermodynamic studies of uranium biosorption by calcium alginate beads.
J Environ Radioact. 2013 Dec; 126:226-31.JE

Abstract

Calcium alginate beads are potential biosorbent for radionuclides removal as they contain carboxyl groups. However, until now limited information is available concerning the uptake behavior of uranium by this polymer gel, especially when sorption equilibrium, kinetics and thermodynamics are concerned. In present work, batch experiments were carried out to study the equilibrium, kinetics and thermodynamics of uranium sorption by calcium alginate beads. The effects of initial solution pH, sorbent amount, initial uranium concentration and temperature on uranium sorption were also investigated. The determined optimal conditions were: initial solution pH of 3.0, added sorbent amount of 40 mg, and uranium sorption capacity increased with increasing initial uranium concentration and temperature. Equilibrium data obtained under different temperatures were fitted better with Langmuir model than Freundlich model, uranium sorption was dominated by a monolayer way. The kinetic data can be well depicted by the pseudo-second-order kinetic model. The activation energy derived from Arrhenius equation was 30.0 kJ/mol and the sorption process had a chemical nature. Thermodynamic constants such as ΔH(0), ΔS(0) and ΔG(0) were also evaluated, results of thermodynamic study showed that the sorption process was endothermic and spontaneous.

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Authors+Show Affiliations

Bai J
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China. Electronic address: baijing@impcas.ac.cn.
Fan F
No affiliation info available
Wu X
No affiliation info available
Tian W
No affiliation info available
Zhao L
No affiliation info available
Yin X
No affiliation info available
Fan F
No affiliation info available
Li Z
No affiliation info available
Tian L
No affiliation info available
Wang Y
No affiliation info available
Qin Z
No affiliation info available
Guo J
No affiliation info available

MeSH

AdsorptionAlginatesGlucuronic AcidHexuronic AcidsThermodynamicsUraniumWater Purification

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24063905

Citation

Bai, Jing, et al. "Equilibrium, Kinetic and Thermodynamic Studies of Uranium Biosorption By Calcium Alginate Beads." Journal of Environmental Radioactivity, vol. 126, 2013, pp. 226-31.
Bai J, Fan F, Wu X, et al. Equilibrium, kinetic and thermodynamic studies of uranium biosorption by calcium alginate beads. J Environ Radioact. 2013;126:226-31.
Bai, J., Fan, F., Wu, X., Tian, W., Zhao, L., Yin, X., Fan, F., Li, Z., Tian, L., Wang, Y., Qin, Z., & Guo, J. (2013). Equilibrium, kinetic and thermodynamic studies of uranium biosorption by calcium alginate beads. Journal of Environmental Radioactivity, 126, 226-31. https://doi.org/10.1016/j.jenvrad.2013.08.010
Bai J, et al. Equilibrium, Kinetic and Thermodynamic Studies of Uranium Biosorption By Calcium Alginate Beads. J Environ Radioact. 2013;126:226-31. PubMed PMID: 24063905.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Equilibrium, kinetic and thermodynamic studies of uranium biosorption by calcium alginate beads. AU - Bai,Jing, AU - Fan,Fangli, AU - Wu,Xiaolei, AU - Tian,Wei, AU - Zhao,Liang, AU - Yin,Xiaojie, AU - Fan,Fuyou, AU - Li,Zhan, AU - Tian,Longlong, AU - Wang,Yang, AU - Qin,Zhi, AU - Guo,Junsheng, Y1 - 2013/09/21/ PY - 2012/05/03/received PY - 2013/02/28/revised PY - 2013/08/30/accepted PY - 2013/9/26/entrez PY - 2013/9/26/pubmed PY - 2014/7/30/medline KW - Calcium alginate beads KW - Equilibrium KW - Kinetics KW - Thermodynamics KW - Uranium SP - 226 EP - 31 JF - Journal of environmental radioactivity JO - J Environ Radioact VL - 126 N2 - Calcium alginate beads are potential biosorbent for radionuclides removal as they contain carboxyl groups. However, until now limited information is available concerning the uptake behavior of uranium by this polymer gel, especially when sorption equilibrium, kinetics and thermodynamics are concerned. In present work, batch experiments were carried out to study the equilibrium, kinetics and thermodynamics of uranium sorption by calcium alginate beads. The effects of initial solution pH, sorbent amount, initial uranium concentration and temperature on uranium sorption were also investigated. The determined optimal conditions were: initial solution pH of 3.0, added sorbent amount of 40 mg, and uranium sorption capacity increased with increasing initial uranium concentration and temperature. Equilibrium data obtained under different temperatures were fitted better with Langmuir model than Freundlich model, uranium sorption was dominated by a monolayer way. The kinetic data can be well depicted by the pseudo-second-order kinetic model. The activation energy derived from Arrhenius equation was 30.0 kJ/mol and the sorption process had a chemical nature. Thermodynamic constants such as ΔH(0), ΔS(0) and ΔG(0) were also evaluated, results of thermodynamic study showed that the sorption process was endothermic and spontaneous. SN - 1879-1700 UR - https://www.unboundmedicine.com/medline/citation/24063905/Equilibrium_kinetic_and_thermodynamic_studies_of_uranium_biosorption_by_calcium_alginate_beads_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0265-931X(13)00192-6 DB - PRIME DP - Unbound Medicine ER -