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- W4280491346 endingPage "107623" @default.
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- W4280491346 abstract "The considerable discrepancy of reagent adsorption is definitely a prerequisite to separate different minerals in flotation, making it necessary to quantify and analyze adsorption reaction with surface sites. In present study, it is the first attempt to quantitatively describe complexation adsorption of sodium oleate (NaOL) on diaspore and kaolinite surfaces through surface complexation model (SCM) theory. The high precision potentiometric titration was conducted to clarify hydration process of active sites on mineral surfaces. Furthermore, NaOL adsorption with great precision and stability was implemented by GCMS method. For diaspore, logarithmic protonation constants for ≡AlOH2+ and ≡AlO- are 5.308 and − 8.701, respectively, while ≡AlOH density is 7.956 sites/nm2. For kaolinite, 5.601, −9.405, −1.1, −7.725, 3.899 are output as the corresponding values of ≡AlOH2+, ≡AlO-, ≡SiOH2+, ≡SiO-, ≡XH. The site ratio on edge and basal planes (≡SOH: ≡X-) was 1.07: 1. NaOL adsorption equilibrium constants were 13.55 for ≡AlOL onto diaspore and 11.76 and 10.35 for ≡AlOL and ≡SiOL onto kaolinite. Finally, all the obtained results were successfully verified and predicted. It not only reflects the chemical characteristic of hydration and adsorption for mineral sites, but also provides the theoretical guidance and foundation for flotation optimization and database construction." @default.
- W4280491346 created "2022-05-22" @default.
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- W4280491346 date "2022-06-01" @default.
- W4280491346 modified "2023-10-10" @default.
- W4280491346 title "Quantitative analysis of surface adsorption reactivity during flotation process by surface complexation model: diaspore and kaolinite" @default.
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- W4280491346 doi "https://doi.org/10.1016/j.mineng.2022.107623" @default.
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