Studies on accumulation of uranium by fungus Lentinus sajor- caju

The untreated, heat- and alkali-treated Lentinus sajor-caju mycelia were used for the recovery of uranium from aqueous solutions. The effect of pH, temperature, initial concentration of UO 2 2+ ions and contact time parameters were investigated in a batch system. The particles sizes of the fungal my...

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Bibliographic Details
Published in:Journal of hazardous materials 2006-08, Vol.136 (2), p.345-353
Main Authors: Bayramoğlu, Gülay, Çelik, Gökce, Arica, M. Yakup
Format: Article
Language:English
Subjects:
Adsorption
Applied sciences
Biological and medical sciences
Biomass
Biosorption
Biotechnology
Chemical and physical treatment
Chemical engineering
Contact angle
Environmental Restoration and Remediation
Exact sciences and technology
Fundamental and applied biological sciences. Psychology
Hydrogen-Ion Concentration
Lentinula - metabolism
Lentinula - ultrastructure
Lentinus sajor-caju
Methods. Procedures. Technologies
Microscopy, Electron, Scanning
Others
Pollution
Surface energy
Temperature
Thermodynamics
Uranium - metabolism
Uranium(VI)
Various methods and equipments
White-rot fungus
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Summary:The untreated, heat- and alkali-treated Lentinus sajor-caju mycelia were used for the recovery of uranium from aqueous solutions. The effect of pH, temperature, initial concentration of UO 2 2+ ions and contact time parameters were investigated in a batch system. The particles sizes of the fungal mycelia were ranging from 100 to 200 μm. Biosorption equilibriums were established in about 30 min and the correlation regression coefficients show that the adsorption process can be well defined by the Freundlich equation. The alkali treated form had a high biosorption capacity (378 mg/g) than those of the untreated (268 mg/g) and heat-treated fungal mycelia (342 mg/g). Optimum biosorption was observed at pH 4.5 for all the tested fungal preparations and was independent of temperature (5–35 °C). In addition, the polarity and surface energy of the fungal biomass film preparations were determined by contact angle measurement. The fungal biomass could be regenerated using 10 mM sodium carbonate, with up to 93% recovery. The biosorbents were used in six biosorption–desorption cycles and no considerable loss in the biosorption capacity was observed.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2005.12.027