Catalytic potential of selected metal ions for bioleaching, and potential techno-economic and environmental issues: a critical review
Pathak, Ashish Morrison, Liam Healy, Mark G.
Pathak, Ashish
Morrison, Liam
Healy, Mark G.
Loading...
Repository DOI
Publication Date
2017-01-06
Type
Article
Downloads
Citation
Pathak, Ashish, Morrison, Liam, & Healy, Mark Gerard. (2017). Catalytic potential of selected metal ions for bioleaching, and potential techno-economic and environmental issues: A critical review. Bioresource Technology, 229, 211-221. doi: http://dx.doi.org/10.1016/j.biortech.2017.01.001
Abstract
Bioleaching is considered to be a low-cost, eco-friendly technique for leaching valuable metals from a variety of matrixes. However, the inherent slow dissolution kinetics and low metal leaching yields have restricted its wider commercial applicability. Recent advancements in bio-hydrometallurgy have suggested that these critical issues can be successfully alleviated through the addition of a catalyst. The catalyzing properties of a variety of metals ions (Ag+, Hg++, Bi+++, Cu++, Co++ etc.) during bioleaching have been successfully demonstrated. In this article, the role and mechanisms of these metal species in catalyzing bioleaching from different minerals (chalcopyrite, complex sulfides, etc.) and waste materials (spent batteries) are reviewed, techno-economic and environmental challenges associated with the use of metals ions as catalysts are identified, and future prospectives are discussed. Based on the analysis, it is suggested that metal ion-catalyzed bioleaching will play a key role in the development of future industrial bio-hydrometallurgical processes.
Funder
Publisher
Elsevier
Publisher DOI
10.1016/j.biortech.2017.01.001
Rights
Attribution-NonCommercial-NoDerivs 3.0 Ireland