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Study of pyrochlore surface chemistry effects on collector adsorption by TOF-SIMS
Surface Science Western, Research Park, University of Western Ontario, Canada.ORCID iD: 0000-0002-2265-6321
Surface Science Western, Research Park, University of Western Ontario, Candada.
Niobec Inc., Canada.
Niobec Inc., Canada.
2012 (English)In: Minerals Engineering, ISSN 0892-6875, Vol. 39, p. 71-76Article in journal (Refereed) Published
Abstract [en]

Time of flight secondary ion mass spectrometry (TOF-SIMS) was used to analyse the surface of two different types of pyrochlore, high Fe pyrochlore and low Fe pyrochlore, from Niobec Saint-Honore mine deposit. Pyrochlore grains were analysed in order to identify a potential relationship between pyrochlore matrix composition, the corresponding surface expression and the related effect on cationic collector adsorption. TOF-SIMS analyses of pyrochlore surfaces from a conditioning test show that the species indicative of the cationic collector, favour the surface of Fe poor pyrochlore relative to the Fe rich variety. Lower collector signals on the surface of the Fe-pyrochlore are matched by higher relative intensities of Fe, OH, O and FeOH. The TOF-SIMS results illustrate a negative relationship between a cationic collector adsorption and the presence of Fe and Fe oxidation species on the surface of pyrochlore grains, and supports previous work which identified a negative correlation between matrix Fe content and pyrochlore floatability. The surface analysis illustrates the link between pyrochlore matrix chemistry, the expression of surface species and their effect on collector adsorption.

Place, publisher, year, edition, pages
2012. Vol. 39, p. 71-76
Keywords [en]
Pyrochlore, Collector adsorption, Surface chemistry, TOF-SIMS
National Category
Mineral and Mine Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-72285DOI: 10.1016/j.mineng.2012.07.014ISI: 000312119600012Scopus ID: 2-s2.0-84866864034OAI: oai:DiVA.org:ltu-72285DiVA, id: diva2:1272069
Available from: 2018-12-18 Created: 2018-12-18 Last updated: 2019-02-25

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Chelgani, Saeed Chehreh

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
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  • vancouver
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  • nn-NB
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Output format
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