Formation of jarosite during Fe2+ oxidation by Acidithiobacillus ferrooxidans |
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| Affiliation: | 1. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China;2. Key Lab of Biometallurgy of Ministry of Education of China, Central South University, Changsha 410083, China;3. Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;4. Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China;1. Department of Chemistry and Bioengineering, Tampere University of Technology, P.O. Box 541, FI-33101 Tampere, Finland;2. Department of Environmental Engineering, Yildiz Technical University, Davutpasa Campus 34220, Esenler, Istanbul, Turkey;1. School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China;2. School of Chemistry and Environmental Engineering, Hanshan Normal University, Chaozhou, 521041, China;3. The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, China;4. School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China;5. College of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing, 526061, China;1. Central South University, Changsha, Hunan, China;2. Key Lab of Biohydrometallurgy of Ministry of Education, Changsha, Hunan, China;3. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, China;4. Department of Mineral Resources and Energy Engineering, Chonbuk National University, Jeonju, Republic of Korea |
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| Abstract: | Jarosite precipitation is a very important phenomenon that is observed in many bacterial cultures. In many applications involving Acidithiobacillus ferrooxidans, like coal desulphurization and bioleaching, it is crucial to minimize jarosite formation in order to increase efficiency. The formation of jarosite during the oxidation of ferrous iron by free suspended cells of A. ferrooxidans was studied. The process was studied as a function of time, pH and temperature. The main parameter affecting the jarosite formation was pH. Several experiments yielded results showing oxidation rates as high as 0.181–0.194 g/L h, with low jarosite precipitation of 0.0125–0.0209 g at conditions of pH 1.6–1.7 with an operating temperature of 35 °C. |
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