naa a22 4500 510821014 CHVBK 20180411083531.0 cr unu---uuuuu 180411e20130501xx s 000 0 eng 10.1007/s11814-013-0017-8 doi (NATIONALLICENCE)springer-10.1007/s11814-013-0017-8 Bench-scale batch bioleaching of spent petroleum catalyst using mesophilic iron and sulfur oxidizing acidophiles [Elektronische Daten] [Haragobinda Srichandan, Dong-Jin Kim, Chandra Gahan, Sradhanjali Singh, Seoung-Won Lee] Microbial leaching of a petroleum spent catalyst was carried out using mixed mesophilic iron and sulfur oxidizing acidophiles. Bench-scale batch stirred tank reactors with a working volume of 1 L were used in this study at 35 °C. The pulp density considered for the study was 10% (w/v), while the particle size of the spent catalyst was varied by 45-106, 106-212 and >212 μm. The leaching percentage of Ni from the spent catalyst was found to be highest (97-98%) with varying particle size. However, the leaching yield for rest of the metals like Al, Fe, V and Mo was 70-74%, 66-85%, 33-43% and 22-45%, respectively. Influence of particle size was predominant on the recovery of all metals except Ni. Assessment of the generation of the bioleach residue after bioleaching showed a weight loss of 54-62% due to the dissolution of the metal values from the spent catalyst. The mineralogical study conducted by X-ray diffraction and scanning electron microscopy supports the dissolution of metals from the spent catalyst. Jarosite mineral phase was the dominant mineral phase in the bioleach residue due to the dissolution of the oxidic and sulfidic mineral phases present in the feed spent catalyst. Korean Institute of Chemical Engineers, Seoul, Korea, 2013 Bioleaching nationallicence Microorganisms nationallicence Spent Catalyst nationallicence Population Dynamics nationallicence Redox Potential nationallicence Srichandan Haragobinda Mineral Resource Research Division, Korea Institute of Geoscience and Mineral Resources (KIGAM), Gwahang-no 124, Yuseong-gu, 305-350, Daejeon, Korea aut Kim Dong-Jin Mineral Resource Research Division, Korea Institute of Geoscience and Mineral Resources (KIGAM), Gwahang-no 124, Yuseong-gu, 305-350, Daejeon, Korea aut Gahan Chandra Mineral Resource Research Division, Korea Institute of Geoscience and Mineral Resources (KIGAM), Gwahang-no 124, Yuseong-gu, 305-350, Daejeon, Korea aut Singh Sradhanjali Mineral Resource Research Division, Korea Institute of Geoscience and Mineral Resources (KIGAM), Gwahang-no 124, Yuseong-gu, 305-350, Daejeon, Korea aut Lee Seoung-Won Nano Engineering Division, School of Engineering, Chungnam National University, 305-764, Daejeon, Korea aut Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/5(2013-05-01), 1076-1082 0256-1115 30:5<1076 2013 30 11814 https://doi.org/10.1007/s11814-013-0017-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11814-013-0017-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Srichandan Haragobinda Mineral Resource Research Division, Korea Institute of Geoscience and Mineral Resources (KIGAM), Gwahang-no 124, Yuseong-gu, 305-350, Daejeon, Korea aut NATIONALLICENCE 700 1- Kim Dong-Jin Mineral Resource Research Division, Korea Institute of Geoscience and Mineral Resources (KIGAM), Gwahang-no 124, Yuseong-gu, 305-350, Daejeon, Korea aut NATIONALLICENCE 700 1- Gahan Chandra Mineral Resource Research Division, Korea Institute of Geoscience and Mineral Resources (KIGAM), Gwahang-no 124, Yuseong-gu, 305-350, Daejeon, Korea aut NATIONALLICENCE 700 1- Singh Sradhanjali Mineral Resource Research Division, Korea Institute of Geoscience and Mineral Resources (KIGAM), Gwahang-no 124, Yuseong-gu, 305-350, Daejeon, Korea aut NATIONALLICENCE 700 1- Lee Seoung-Won Nano Engineering Division, School of Engineering, Chungnam National University, 305-764, Daejeon, Korea aut NATIONALLICENCE 773 0- Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/5(2013-05-01), 1076-1082 0256-1115 30:5<1076 2013 30 11814 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer