Optimization of silver biosorption by fungi forming granules from aqueous solutions of silver nitrate
| Autor: | A. Ye Kuznetsov, Sergei V. Kalenov, Dmitry V. Tyupa, Dmitry A. Skladnev, O. V. Kabanov, Marina M. Baurina |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Economics and Econometrics Environmental Engineering 010501 environmental sciences Management Monitoring Policy and Law 01 natural sciences chemistry.chemical_compound symbols.namesake Adsorption 010608 biotechnology Fusarium oxysporum medicine Environmental Chemistry 0105 earth and related environmental sciences Waste management biology Biosorption food and beverages Langmuir adsorption model biology.organism_classification General Business Management and Accounting Penicillium glabrum Silver nitrate Activated sludge chemistry symbols Nuclear chemistry Activated carbon medicine.drug |
| Zdroj: | Clean Technologies and Environmental Policy. 19:53-62 |
| ISSN: | 1618-9558 1618-954X |
| Popis: | Silver removal from industrial waste waters by biosorbents is more profitable as compared with traditional sorbents such as ion-exchange resins or activated carbon. Silver biosorption by the filamentous fungi Penicillium glabrum, Fusarium nivale, and Fusarium oxysporum isolated from activated sludge was studied. These cultures formed granules which had tolerance to silver of high doses that allowed accumulating silver effectively. Through the selection of the optimal growth phase of the microorganisms, pH value, temperature, and chemical composition of the medium, it was possible to obtain the silver biosorbents having the adsorption capacity attaining nearly 988 mg/g. The process was best described with Langmuir isotherm; the kinetics of biosorption of silver by fungal granules obeyed the pseudo-second-order model. |
| Databáze: | OpenAIRE |
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