Advances in carboxylate collectors adsorption on monazite surface: Part 1 – Assessment of the hydroxylation and carbonation of surface lanthanide ions

Geneyton, Anthony; Filippov, L.O.; Renard, Aurélien; Mallet, Martine; Ménad, Nour‐Eddine

doi:10.1016/j.apsusc.2019.04.017

Cited by 8 publications

(3 citation statements)

References 50 publications

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“…However, at pH above the IEP, an increase in the amount of dissolved carbonate species induced higher zeta potential values, which is inconsistent with a simple presence of additional negative charges in the EDL or on the mineral surface. In a previous study, we suggested that the under-coordinated lanthanide ions on the monazite mineral surface may react with dissolved carbonate species [20]. However, in this study, as mentioned in the introduction section, after treatment with sodium carbonate and thorough rinsing with deionised water, surface probing did not highlight a significant carbonation, suggesting that the interactions between the monazite surface ions and dissolved carbonate species are not strong in nature.…”

Section: Zeta Potential Of Monazite Treated In Co2 Depleted Electrolyte Solutioncontrasting

confidence: 52%

“…In a previous study, we examined the affinity of monazite surface lanthanide ions with carbonate species using synthetic monazites. It was shown that treatment with significant amounts of sodium carbonate did not result in mineral surface carbonation after thorough rinsing with deionised water [20]. However, in the literature, the monazite electrophoretic mobility has been reported tending towards zero, for a broad pH range, when measured in a Na2CO3 solution rather than NaCl solution [21].…”

Section: Introductionmentioning

confidence: 99%

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Effects of atom substitutions and dissolved carbonate species on monazite electrophoretic mobility

Geneyton

Filippov

Ménad

2019

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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In this study, the atom substitutions that commonly affect the monazite lattice were considered as potential factors affecting the monazite electrophoretic mobility. The influence of light rare-earth elements (LREE) substitutions and the presence of thorium, calcium, and silicate within the monazite crystal lattice was also examined using a natural monazite and synthetic cerium, lanthanum and neodymium monazite materials. Electrophoretic mobility measurements performed after treatment in an electrolyte solution equilibrated with air outline that LREE substitutions and other substitutions observed in the tested natural monazite did not affect the mineral surface properties.Conversely, the electrophoretic mobility of the synthetic monazites was found to be significantly affected by the amount of dissolved carbonate species present in the aqueous media. More precisely, carbonate species were found to decrease the electrophoretic mobility of monazite.Unlike tests performed with a solution equilibrated with air, the electrophoretic mobility of monazite treated in a CO2 depleted electrolyte solution, under controlled atmosphere, were found erratic. This highlights the difficulty in obtaining reliable electrophoretic mobility data when the carbonate content in the supporting electrolyte solutions is not controlled.

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Section: Zeta Potential Of Monazite Treated In Co2 Depleted Electrolyte Solutioncontrasting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Effects of atom substitutions and dissolved carbonate species on monazite electrophoretic mobility

Geneyton

Filippov

Ménad

2019

Colloids and Surfaces A: Physicochemical and Engineering Aspect

Self Cite

View full text Add to dashboard Cite

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“…Other coexisting cations like La 3+ , Pb 2+ , Al 3+ , and Fe 3+ may improve the flotation efficiency of REMs, as noted by many researchers [43,71,78,85,104,[126][127][128][129]. These cations are artificially added into the flotation pulp to make the surface of REMs more positively charged (e.g., PbOH + adsorption) and improve collector adsorption.…”

Section: Roles Of Dissolved Ions In Rare Earth Mineral Flotationmentioning

confidence: 99%

Rare Earth Elements Recovery from Primary and Secondary Resources Using Flotation: A Systematic Review

et al. 2023

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Rare earth minerals (REMs) contain rare earth elements (REEs) that are important in modern technologies due to their unique magnetic, phosphorescent, and catalytic properties. However, REMs are not only non-renewable resources but also non-uniformly distributed on the Earth’s crust, so the processing of REE-bearing secondary resources via recycling is one potential route to ensure the long-term sustainability of REE supply. Flotation—a method that separates materials based on differences in their surface wettability—is a process applied for both mineral processing and recycling of REEs, especially when the particles are fine and/or a high-purity product is required. In this review, studies about rare earth flotation from 2012 to 2021 were systematically reviewed using the PRISMA guideline. It was found that most REM flotation research works focused on finding better collectors and depressants while, for recycling, studies on advanced flotation techniques like froth flotation, ion flotation, solvent sublation, electroflotation, and adsorbing colloid flotation with an emphasis on the recovery of dissolved REEs from aqueous solutions dominated.

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Synergistic adsorption of lanthanum ions and fatty acids for efficient rare-earth phosphate recovery: Surface analysis and ab initio molecular dynamics studies

Geneyton

Foucaud

Filippov

et al. 2020

Applied Surface Science

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Advances in carboxylate collectors adsorption on monazite surface: Part 1 – Assessment of the hydroxylation and carbonation of surface lanthanide ions

Cited by 8 publications

References 50 publications

Effects of atom substitutions and dissolved carbonate species on monazite electrophoretic mobility

Effects of atom substitutions and dissolved carbonate species on monazite electrophoretic mobility

Rare Earth Elements Recovery from Primary and Secondary Resources Using Flotation: A Systematic Review

Synergistic adsorption of lanthanum ions and fatty acids for efficient rare-earth phosphate recovery: Surface analysis and ab initio molecular dynamics studies

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