Please use this identifier to cite or link to this item: https://hdl.handle.net/11499/6249
Title: Adsorption and thermodynamics studies of U(VI) by composite adsorbent in a batch system
Authors: Donat, Ramazan
Keywords: Adsorption
Composite adsorbent
Isotherms
Uranium
Adsorbers
Adsorption patterns
Aqueous solutions
Batch systems
Composite adsorbents
Contact time
Dubinin-Radushkevich
Equilibrium isotherms
Exothermic heat
Freundlich
Langmuir models
Langmuirs
Optimized conditions
Solution pH
Sorbent materials
Sorption capacities
Sorption energy
Thermodynamic parameter
Uranium ion
Metal ions
Models
pH effects
Solutions
Abstract: The adsorption of U(VI) from aqueous solutions onto composite adsorbent (algistar) has been studied using a batch adsorber. The parameters that affect the U(VI) sorption, such as contact time, solution pH, initial U(VI) concentration, and temperature, have been investigated and optimized conditions determined. Equilibrium isotherm studies were used to evaluate the maximum sorption capacity of composite adsorbent, and experimental results showed this to be 43.10 mg/g. The adsorption patterns of metal ions on composite adsorbent followed the Langmuir, Freundlich and Dubinin-Radushkevich (D-R) isotherms. The Freundlich, Langmuir, and D-R models have been applied, and the data correlate well with Langmuir model, and that the sorption is physical in nature (the sorption energy Eads = 12.90 kJ/mol). Thermodynamic parameters (?Hadso = -41.08 kJ/mol, ?Sadso = -68.00 J/mol K, ?Gads (298.15 K) = -20.81 kJ/mol) showed the exothermic heat of adsorption and the feasibility of the process. The results suggested that the composite adsorbent is suitable as a sorbent material for recovery and biosorption/adsorption of uranium ions from aqueous solutions. © 2010 Springer-Verlag.
URI: https://hdl.handle.net/11499/6249
https://doi.org/10.1007/s11581-010-0463-9
ISSN: 0947-7047
Appears in Collections:Fen-Edebiyat Fakültesi Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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