Journal article
Sequential leaching of metals from spent refinery catalyst in bioleaching–bioleaching and bioleaching–chemical leaching reactor: Comparative study
Hydrometallurgy, Vol.150, pp.130-143
2014
Abstract
The effect of sequential leaching such as bioleaching followed by bioleaching and bioleaching followed by chemical leaching is aimed at enhancing metal (Mo, Ni, V and Al) dissolution from a differently pretreated (acetone washed/decoked) spent catalyst. The X-ray photoelectron spectroscopy characterization of spent catalyst samples suggested the presence of metals in their oxide and sulfide forms. Bioleaching followed by bioleaching with either Acidithiobacillus thiooxidans (Ni-100%, Al-55%, Mo-81% and V-100%) or Acidithiobacillus ferrooxidans (Ni-94%, Al-55%, Mo-77% and V-99%) significantly enhanced removal of Al, Ni, and V from acetone washed (AS) spent catalyst compared to decoked spent catalyst (RS). In contrast, bioleaching using either A. thiooxidans or A. ferrooxidans followed by alkali leaching remarkably enhanced removal of Mo from both AS and RS, although higher yields were achieved using AS. Bioleaching using A. thiooxidans followed by alkaline leaching is an optimum strategy yielding a maximum of 96% Mo in 125 h from AS. A field emission scanning electron microscopic study revealed only minor stretches of Mo in the treated AS.
Details
- Title
- Sequential leaching of metals from spent refinery catalyst in bioleaching–bioleaching and bioleaching–chemical leaching reactor: Comparative study
- Authors/Creators
- H. Srichandan (Author/Creator) - Chungnam National UniversityA. Pathak (Author/Creator) - Korea Institute of Geoscience and Mineral ResourcesS. Singh (Author/Creator) - Korea Institute of Geoscience and Mineral ResourcesK. Blight (Author/Creator) - Murdoch UniversityD-J Kim (Author/Creator) - Korea Institute of Geoscience and Mineral ResourcesS.W. Lee (Author/Creator) - Chungnam National University
- Publication Details
- Hydrometallurgy, Vol.150, pp.130-143
- Publisher
- Elsevier BV
- Identifiers
- 991005540378407891
- Copyright
- © 2014 Elsevier B.V.
- Murdoch Affiliation
- School of Engineering and Information Technology
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 7 Engineering & Materials Science
- 7.229 Mineral & Metal Processing
- 7.229.774 Bioleaching
- Web Of Science research areas
- Metallurgy & Metallurgical Engineering
- ESI research areas
- Materials Science