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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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