Please use this identifier to cite or link to this item: https://hdl.handle.net/11499/5863
Title: Biosorption of uranium(VI) by bi-functionalized low cost biocomposite adsorbent
Authors: Aytas, S.
Turkozu, D.A.
Gök, Cem
Keywords: Algae
Biocomposite
Biosorption
Isotherm
Uranium
Yeast
Biosorbents
Biosorption process
Contact time
Dubinin-Radushkevich
Experimental data
Flory-Huggins isotherm
Freundlich
Initial concentration
Isotherm models
Langmuirs
Low costs
Marine algae
Single-component systems
Temkin model
Thermodynamic parameter
Two-parameter equation
Uranium ion
Adsorption
Cell immobilization
Dyes
Gels
Isotherms
Silica
Silica gel
Solutions
Uranium compounds
adsorption
alga
aqueous solution
composite
Gibbs free energy
immobilization
isotherm
thermodynamics
uranium
yeast
algae
Jania rubens
Saccharomyces cerevisiae
Abstract: This paper presents biosorption properties of U(VI) by bi-functionalized biocomposite adsorbent consists of macro marine algae (Jania rubens) and yeast (Saccharomyces cerevisiae) immobilized on silica gel. Removal of U(VI) from aqueous solution by biosorption on biocomposite in a single component system with pH, initial concentration of U(VI), various contact time and temperature was investigated. Experimental equilibrium biosorption data was analyzed by five two-parameter equations, namely; Langmuir, Freundlich, Dubinin-Radushkevich (D-R), Temkin and Flory-Huggins isotherms. Among these isotherm models, the Temkin model fits better with the experimental data compared to others. Thermodynamic parameters, such as the enthalpy (?H°), entropy (?S°) and Gibbs free energy (?G°) were calculated from the slope and intercept of logK d vs. 1/T plot. Results suggested that the bi-functionalized low cost biocomposite adsorbent is a suitable biosorbent material to remove uranium ions from diluted aqueous solutions. On the other hand, immobilization of algae and yeast on silica gel was found to improve their interaction properties with uranium ions in biosorption process. © 2011 Elsevier B.V.
URI: https://hdl.handle.net/11499/5863
https://doi.org/10.1016/j.desal.2011.07.023
ISSN: 0011-9164
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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