Bioleaching of djurleite using Acidithiobacillus ferrooxidans |
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| Affiliation: | 1. Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Mianyang 621010, China;2. School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;1. Linné FLOW Centre, KTH Mechanics, Osquars Backe 18, Stockholm, Sweden;2. Department of Mechanical, Materials and Aerospace Engineering (MMAE), llinois Institute of Technology (IIT), Chicago, IL, 60616, USA;1. Tianjin Key Laboratory of Marine Resources and Chemistry, College of Marine Science and Engineering, Tianjin University of Science & Technology, Tianjin 300457, PR China;2. Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, PR China;1. Department of Mechanical and Industrial Engineering, IIT Roorkee 247667, India;2. Department of Mechanical Engineering, Ujjain Engineering College, Ujjain 456010, India;1. University of Oldenburg, Department of Physics, Energy and Semiconductor Research Laboratory, Carl-von-Ossietzky-Straße 9-11, 26129 Oldenburg, Germany;2. Fraunhofer Institute for Manufacturing Technology and Advanced Materials (IFAM), Marie-Curie-Straße 1-3, 26129 Oldenburg, Germany |
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| Abstract: | The bioleaching of djurleite using Acidithiobacillus ferrooxidans (LD-1) was investigated in this paper. Experiments were carried out in shake flasks at pH 2.0, 160 r/min and 30 °C. The leaching residues were analyzed using X-ray diffraction (XRD), Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The total copper extraction of djurleite under optimal condition reached 95.12%. The XRD analysis indicated the residues mainly consisted of ammoniojarosites and S8. It was observed by the SEM image that the djurleite was heavily etched. The XPS results confirmed the intermediate product formed during djurleite leaching was CuS. The result indicates the reaction pathway is: Cu31S16 → CuS → tCu2+ and S0. |
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