Journal article
Reductive dissolution by waste newspaper for enhanced meso-acidophilic bioleaching of copper from low grade chalcopyrite: A new concept of biohydrometallurgy
Hydrometallurgy, Vol.153, pp.98-105
2015
Abstract
Dumping of low-grade chalcopyrite encompasses several environmental problems. Despite slow dissolution rate, meso-acidophilic bioleaching is preferred for the extraction of copper from such ores. In the present study, meso-acidophilic bioleaching of a low-grade chalcopyrite in the presence of an acid-processed waste newspaper (PWp) is discussed for the first time. The study illustrated a strong catalytic response of PWp with enhanced bio-recovery of copper from acid-conditioned chalcopyrite. A maximum of 99.13% copper recovery (0.36% Cu dissolution/day) was obtained in 6 days of bioleaching in the presence of 2 gL- 1 PWp in contrast to only 5.7% copper in its absence. FTIR analysis of bioleached residues revealed similar spectral patterns to the original acid-conditioned ore in the presence of PWp, thus indicating less development of passivation layer which was also confirmed through a complementary Raman characterization of the bioleached residues. Further, a reaction mechanism (chemistry) was proposed suggesting the possible role of PWp as the electron donor under oxygen limiting conditions which facilitated microbial reduction of Fe (III). The resulting biochemical changes provided an energy source for the bacteria, thus allowing free flow of electrons through the ore surface, thus contributing towards enhanced bioleaching of copper.
Details
- Title
- Reductive dissolution by waste newspaper for enhanced meso-acidophilic bioleaching of copper from low grade chalcopyrite: A new concept of biohydrometallurgy
- Authors/Creators
- S. Panda (Author/Creator) - Institute of Minerals and Materials TechnologyA. Biswal (Author/Creator) - Institute of Minerals and Materials TechnologyS. Mishra (Author/Creator) - Institute of Minerals and Materials TechnologyP.K. Panda (Author/Creator) - Institute of Minerals and Materials TechnologyN. Pradhan (Author/Creator) - Institute of Minerals and Materials TechnologyU. Mohapatra (Author/Creator) - Maharaja Sriram Chandra Bhanja Deo UniversityL.B. Sukla (Author/Creator) - Institute of Minerals and Materials TechnologyB.K. Mishra (Author/Creator) - Institute of Minerals and Materials TechnologyA. Akcil (Author/Creator) - Süleyman Demirel University
- Publication Details
- Hydrometallurgy, Vol.153, pp.98-105
- Publisher
- Elsevier BV
- Identifiers
- 991005543225307891
- Copyright
- © 2015 Elsevier B.V.
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
Metrics
62 Record Views
InCites Highlights
These are selected metrics from InCites Benchmarking & Analytics tool, related to this output
- 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