Affiliation:
1. Centre for Mineral Biogeochemistry, University of the Free State, Bloemfontein 9301, South Africa
2. Centre for Environmental Management, University of the Free State, Bloemfontein 9301, South Africa
Abstract
The rapid and improper disposal of electronic waste (e-waste) has become an issue of great concern, resulting in serious threats to the environment and public health. In addition, e-waste is heterogenous in nature, consisting of a variety of valuable metals in large quantities, hence the need for the development of a promising technology to ameliorate environmental hazards associated with the indiscriminate dumping of e-waste, and for the recovery of metal components present in waste materials, thus promoting e-waste management and reuse. Various physico-chemical techniques including hydrometallurgy and pyrometallurgy have been employed in the past for the mobilization of metals from e-waste. However, these approaches have proven to be inept due to high operational costs linked to the consumption of huge amounts of chemicals and energy, together with high metal loss and the release of secondary byproducts. An alternative method to avert the above-mentioned limitations is the adoption of microorganisms (bioleaching) as an efficient, cost-effective, eco-friendly, and sustainable technology for the solubilization of metals from e-waste. Metal recovery from e-waste is influenced by microbiological, physico-chemical, and mineralogical parameters. This review, therefore, provides insights into strategies or pathways used by microorganisms for the recovery of metals from e-waste.
Funder
Directorate of Research and Development
Centre for Mineral Biogeochemistry of the University of the Free State
Biogeochemistry Research Infrastructure Platform (BIOGRIP) of the Department of Science and Innovation of South Africa
Subject
Geology,Geotechnical Engineering and Engineering Geology
Reference148 articles.
1. bioleaching of copper from waste printed circuit boards by bacteria-free cultural supernatant of iron-sulfur oxidizing bacteria;Wu;Bioresour. Bioprocess,2018
2. A review of biocyanidation as a sustainable route for cold recovery from primary and secondary low-grade resources;Wang;J. Clean. Prod.,2021
3. On the implementation of the circular economy route for e-waste management: A critical review and an analysis for the case of the State of Kuwait;Leeke;J. Environ. Manag.,2022
4. Forti, V., Balde, C.P., Kuehr, R., and Bel, G. (2020). The Global E-Waste Monitor 2020: Quantities, Flows and the Circular Economy Potential, International Solid Waste Association.
5. Disentangling the worldwide web of e-waste and climate change co-benefits;Singh;Circ. Econ.,2022
Cited by
9 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献