Akinetic study of the depyritization of oil shale HCl-kerogen concentrate by Thiobacillus ferrooxidans at different temperatures
| Autor: | Vesna Dragutinović, G Olga Cvetkovic, Valerija Matic, Miroslav M. Vrvić, K Dragomir Vitorovic, D Snezana Spasic |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2003 |
| Předmět: |
0209 industrial biotechnology
Inorganic chemistry Kinetics 0211 other engineering and technologies Mineralogy 02 engineering and technology Activation energy depyritization engineering.material kinetics lcsh:Chemistry Hydrolysis chemistry.chemical_compound 020901 industrial engineering & automation oil shale Kerogen thiobacillus ferrooxidans 021102 mining & metallurgy Chemistry Substrate (chemistry) General Chemistry Arrhenius plot lcsh:QD1-999 13. Climate action engineering Pyrite Oil shale |
| Zdroj: | Journal of the Serbian Chemical Society, Vol 68, Iss 4-5, Pp 417-423 (2003) Scopus-Elsevier |
| ISSN: | 1820-7421 0352-5139 |
| Popis: | The results of kinetic studies of bacterial depyritization of HCl-kerogen concentrate of Aleksinac (Serbia) oil shale by the chemolithoautotrophic thionic bacteria Thiobacillus ferrooxidans under discontinuous laboratory conditions at various temperatures (0, 20, 28 and 37 ?C) at a pH of ca. 1.5 are presented in this paper. Low pH prevents the occurrence of the precipitation of iron(III)-ion hydrolysis products on the substrate particles and thereby reduces the process efficiency. Bacterial depyritization is developed as per kinetics of the first order. The activation energy which points to a successive mechanism of pyrite biooxidation, was computed from the Arrhenius plot. The biochemical kinetics indicators point to a high affinity of the bacteria toward pyrite but small values of Vmax, which are probably the result of decelerated metabolic processes due to the low pH value of the environment resp. the large difference of thepHbetween the external medium and the cell interior. |
| Databáze: | OpenAIRE |
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