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Journal article
The effects of NaCl addition on the particle-bubble interactions of galena in the presence of xanthate
Results in surfaces and interfaces, Vol.14, 100191
2024
Abstract
This work investigated the effects of NaCl addition on galena flotation in the presence of xanthate. The micro-flotation experiments were performed using NaCl solutions which also included xanthate, at pH 9 (±0.1). Our results indicated that galena recovery improved for higher NaCl as well as higher xanthate concentrations.
A pH-dependent chemisorption model for the galena surface, with the addition of xanthate adsorption was calibrated using measured zeta potential values. We propose that xanthate adsorption on galena can take place via two separate mechanisms. The first mechanism involves direct xanthate chemisorption to specific surface sites. The second mechanism involves lead/xanthate complexes formed in the bulk solution. These lead/xanthate complexes attach on the galena surface as hydrophobic lead xanthate salts.
The galena-air bubble interactions are repulsive in 1 mM NaCl, with or without xanthate, consistent with the lower galena recovery measured experimentally. An increase to 100 mM NaCl, irrespective of the xanthate addition, resulted in attractive galena-air bubble total interaction energies. The agreement with the experimental results shows the effectiveness of the charge regulated model for estimating the galena and air bubble behaviours during flotation in NaCl solutions.
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•Galena recovery increases with increasing NaCl and xanthate concentrations.•Our model shows that xanthate anion attaches to the neutral galena surface site.•Adsorption of xanthate can take place via direct chemisorption.•Xanthate can also attach via metal ions-xanthate complex formations in the bulk.
Details
- Title
- The effects of NaCl addition on the particle-bubble interactions of galena in the presence of xanthate
- Authors/Creators
- Anna M. Nowosielska - Murdoch UniversityAleksandar N. Nikoloski - Murdoch UniversityDrew F. Parsons - Harry Butler Institute (Centre for Water, Energy and Waste), College of Science, Health, Engineering and Education (Engineering and Energy), Murdoch University, 90 South St, Murdoch, WA 6150, Australia
- Publication Details
- Results in surfaces and interfaces, Vol.14, 100191
- Publisher
- Elsevier B.V
- Identifiers
- 991005643069407891
- Copyright
- © 2024 The Authors.
- Murdoch Affiliation
- School of Engineering and Energy; Centre for Water, Energy and Waste
- Language
- English
- Resource Type
- Journal article
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