Characterization of water extracts of oil shale retorting residues form gaseous and solid heat carrier processes
| Autor: | Eero Piirisalu, Eiliv Steinnes, Eija Schultz, Natalya Irha, Matti T. Leppänen, Janek Reinik, Villem Aruoja |
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| Rok vydání: | 2015 |
| Předmět: |
General Chemical Engineering
ta1172 öljyliuske Daphnia magna Heat carrier Energy Engineering and Power Technology chemistry.chemical_element myrkyllisyys Retort complex mixtures law.invention tislaus oil shale law retorting ash Leachate biology öljynjalostus toxicity biology.organism_classification Decomposition toksisuus Salinity Fuel Technology jäämät chemistry Molybdenum Environmental chemistry semi-coke Oil shale |
| Zdroj: | Fuel Processing Technology. 131:443-451 |
| ISSN: | 0378-3820 |
| Popis: | The present work focuses on the environmental effect of oil shale retorting residues originating from gaseous (GHC) and solid heat carrier (SHC) technologies. Samples were taken from Viru Keemia Grupp Oil factory (VKG Oil Ltd, Estonia). The water extracts of semi-coke samples from GHC retorting plants were non-toxic. The leachate water of SHC retorting ash was acutely toxic to Daphnia magna among tested organisms. The water extracts of semi-coke and retorting ash were acutely toxic at lower pH values and the release of anions and molybdenum increased significantly. The results show strong positive correlation between the toxicity and salinity/electric conductivity of the leachates. Release of anions in turn is related to the degree of decomposition of mineral phases during the retorting process. |
| Databáze: | OpenAIRE |
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