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dc.contributor.authorBryan, Christopher
dc.contributor.authorWatkin, Elizabeth
dc.contributor.authorMcCredden, Timothy
dc.contributor.authorWong, Zachary
dc.contributor.authorHarrison, S.
dc.contributor.authorKaksonen, A.
dc.date.accessioned2017-01-30T11:28:26Z
dc.date.available2017-01-30T11:28:26Z
dc.date.created2015-07-16T06:21:51Z
dc.date.issued2015
dc.identifier.citationBryan, C. and Watkin, E. and McCredden, T. and Wong, Z. and Harrison, S. and Kaksonen, A. 2015. The use of pyrite as a source of lixiviant in the bioleaching of electronic waste. Hydrometallurgy. 152: pp. 33-43.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/12046
dc.identifier.doi10.1016/j.hydromet.2014.12.004
dc.description.abstract

Electronic waste (e-waste) contains a wide range of elements, many of which are highly toxic to environmental and human health. On the other hand e-waste represents a significant potential source of valuable metals. This study used microbial oxidation of pyrite to generate a biolixiviant. Its efficiency in the dissolution of metals from printed circuit boards (PCBs) was evaluated as well as the effects of metals and PCB concentrations on microbial activity. The addition of elemental metals (Cu, Cr, Ni, Sn, Zn) had an immediate inhibitory effect on pyrite oxidation, though leaching recovered after a period of adaptation. Bioleaching was inhibited initially by the addition of 1 % (w/v) ground PCB, but recovered rapidly, whereas pulp densities of =5 % had sustained negative impacts on culture activity and viability. The loss of culture viability meant that only abiotic copper dissolution occurred at=5 % PCB. Final copper recoveries declinedwith increasing PCB pulp density. The relatively high content of elemental iron caused a lag period in copper solubilisation possibly due to displacement reactions. Leptospirillum ferriphilum was primarily responsible for pyrite oxidation, and most affected by both the pure metals (particularly Ni and Cu) and PCB.

dc.publisherElsevier
dc.subjectBioleaching
dc.subjectE-waste
dc.subjectPyrite
dc.subjectPCB
dc.titleThe use of pyrite as a source of lixiviant in the bioleaching of electronic waste
dc.typeJournal Article
dcterms.source.volume152
dcterms.source.startPage33
dcterms.source.endPage43
dcterms.source.issn0304-386X
dcterms.source.titleHydrometallurgy
curtin.departmentSchool of Biomedical Sciences
curtin.accessStatusFulltext not available


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