Phosphogypsum biotransformation in cultures of sulphate reducing bacteria in whey |
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| Authors: | Dorota Wolicka Andrzej Borkowski |
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| Institution: | 1. Institute of Mineralogy, Geochemistry and Petrology, Al. ?wirki i Wigury 93, 02-089 Warsaw, Poland;2. Institute of Agricultural Microbiology, Department of Soil Sciences, Faculty of Agriculture and Biology, Warsaw Agricultural University, Nowoursynowska 159, 02-776 Warsaw, Poland;1. Key Laboratory of High-Efficient Mining and Safety of Metal, Ministry of Education, University of Science and Technology Beijing, Beijing 100083, China;2. School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China;1. College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China;2. Beijing Municipal Research Institute of Environmental Protection, Beijing 100037, China;1. State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, P.O. Box 821, Nanjing, PR China;2. College of Resources and Environment, Yunnan Agriculture University, Kunming 650201, PR China;1. High Institute of Biotechnology of Sfax, University of Sfax, Route de Soukra Km 4.5 P.O. Box 1175, 3038 Sfax, Tunisia;2. Departamento de Ambiente da Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal;3. Departamento de Biologia da Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal;5. Departamento de Biologia da Faculdade de Ciências da Universidade do Porto, Universidade do Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal;6. Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, P 4050-123 Porto, Portugal;7. ECT Oekotoxikologie GmbH, Böttgerstrasse 2-14, D-65439 Flörsheim am Main, Germany;1. Key Laboratory of High-Efficient Mining and Safety of Metal, Ministry of Education, University of Science and Technology Beijing, Beijing, 100083, China;2. School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing, 100083, China;3. School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, 550025, China |
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| Abstract: | Assemblages of anaerobic sulphidogenic microorganisms were isolated from soil polluted by oil-derived products and grown using the microcosms method. The cultures were grown in minimal and Postgate media with phosphogypsum (PG) as the sole electron acceptor and with lactate, casein or lactose as the sole carbon source. The most effective was the assemblage in Postgate medium with lactose as the sole carbon source. A reduction of 980 mg COD l?1 (reduction of about 40%) and 790 mg SO42? l?1 (reduction of 53% of phosphogypsum introduced to the medium) was noted in the culture. The lowest activity was observed for minimal medium with lactose as sole carbon source (reduction of 4.4% COD and 40% PG). The selected assemblage became an inoculum for a culture in Postgate, minimal and/or distilled water medium with PG (6 g l?1) and cheese whey (2.5 and 4.5 g l?1).A percentage reduction of COD and SO42? of PG was observed in all cultures. After growth, the residues were weighed and in all cases a distinct mass reduction of PG was observed in comparison to the 6 g l?1 introduced to the medium. Diffractometric studies of the residues confirmed the presence of calcite and apatite. The presence of these mineral phases in the residues allows their application as agricultural fertilisers. |
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