Effect of Ca2+, Mg2+ and SO42− ions on the zeta potential of calcite and dolomite particles aged with stearic acid

Kasha, Ahmed; Al-Hashim, Hasan S.; Abdallah, Wael; Taherian, Reza; Sauerer, Bastian

doi:10.1016/j.colsurfa.2015.05.043

Cited by 114 publications

(121 citation statements)

References 43 publications

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“…It can be speculated that the adsorption of Ca 2+ or Mg 2+ on the apatite surface can increase the active sites which react with the carboxylate ion of fatty acid soap, contributing to the improvement of apatite floatability. The high recovery of dolomite was mainly attributed to the relatively high concentration of cations in the surface lattice [24], thus a low concentration of Ca 2+ and Mg 2+ exhibited a negligible influence on the flotation performance of dolomite. However, in the case of high concentration, the extra divalent metal ions in the bulk would react with fatty acid soap, reducing the amount available for dolomite collection [12].…”

Section: Hydrolysis Equilibria Of Metal Ionsmentioning

confidence: 98%

“…Hence, the effect of calcium ions on the zeta potential of minerals was studied. Previous studies were focused separately on the zeta potential measurements of apatite [26,27], dolomite [24,28], and quartz [29] in the presence of calcium ions. In fact, the zeta potentials varied due to different ionic strength, experimental apparatus, sample preparation process, etc.…”

Section: Zeta Potentials Of Pure Minerals In the Presence Of Calcium mentioning

confidence: 99%

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Effects of Metal Ions on the Flotation of Apatite, Dolomite and Quartz

et al. 2018

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Abstract:The effects of Ca 2+ , Mg 2+ , Al 3+ , and Fe 3+ on the flotation behaviors of apatite, dolomite and quartz were investigated through a micro-flotation test, and the influence of calcium ions on the flotation of these minerals was further elucidated by solution chemistry study, zeta potential measurement, and X-ray photoelectron spectroscopy (XPS) analyses. The results indicate that an appropriate amount of Ca 2+ and Mg 2+ can improve the floatability of apatite but had a negligible effect on the flotation performance of dolomite, whereas Al 3+ , Fe 3+ , and excessive amounts of Ca 2+ decreased the recovery of apatite and dolomite. The studied metal cations can activate quartz at a particular pH. It can be inferred from solution chemistry and zeta potential measurement that the influence of metal ions on the flotation of different minerals should be attributed to the adsorption of various hydrolysis species on the mineral surfaces. XPS analyses reveal that calcium ions can enhance the adsorption of anionic collector on apatite and quartz surfaces, and there are no apparent changes to be observed on the surface of dolomite in the absence and presence of calcium ions at a concentration of 2.5 × 10 −3 M, which was in good agreement with the micro-flotation results.

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Section: Hydrolysis Equilibria Of Metal Ionsmentioning

confidence: 98%

Section: Zeta Potentials Of Pure Minerals In the Presence Of Calcium mentioning

confidence: 99%

Effects of Metal Ions on the Flotation of Apatite, Dolomite and Quartz

et al. 2018

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“…Cicerone et al, 1992, Vdovic, 2001, the importance of controlling CO2 partial pressure (pCO2) in open or closed-system experiments (Thompson and Pownall, 1989;Heberling et al, 2011), the impact of wetting state in the presence of NAPLs (e.g. Jackson and Vinogradov, 2012;Kasha et al, 2015), and the effect of PDI concentration (Pierre et al, 1990;Zhang and Austad, 2006;Strand et al, 2006;Alotaibi et al, 2011;Chen et al, 2014;Alotaibi and Yousef, 2015;Mahani et al, 2015a,b). However, few report measurements of zeta potential in carbonates at conditions relevant to natural subsurface systems.…”

Section: Introductionmentioning

confidence: 99%

Zeta potential of intact natural limestone: Impact of potential-determining ions Ca, Mg and SO4

Alroudhan

Vinogradov

Jackson

2016

Colloids and Surfaces A: Physicochemical and Engineering Aspect

157

161

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We report measurements of the zeta potential on intact limestone samples obtained using the streaming potential method (SPM), supplemented by the more ubiquitous electrophoretic mobility method (EPM). The effect of the potential-determining ions (PDI) Ca, Mg and SO4, and the total ionic strength controlled by NaCl concentration, is investigated over the range typical of natural brines. We find that the zeta potential varies identically and linearly with calcium and magnesium concentration expressed as pCa or pMg. The zeta potential also varies linearly with pSO4. The sensitivity of the zeta potential to PDI concentration, and the IEP expressed as pCa or pMg, both decrease with increasing NaCl concentration. We report considerably lower values of IEP than most previous studies, and the first observed IEP expressed as pMg. The sensitivity of the zeta potential to PDI concentration is lower when measured using the SPM compared to the EPM, owing to the differing location of the shear 2 plane at which the zeta potential is defined. SPM measurements are more appropriate in natural porous samples because they reflect the mineral surfaces that predominantly interact with the adjacent fluids. We demonstrate that special cleaning procedures are required to return samples to a pristine zeta potential after exposure to PDIs. We apply our results to an engineering process: the use of modified injection brine composition to increase oil recovery from carbonate reservoirs. We find a correlation between an increasingly negative zeta potential and increased oil recovery.

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“…The Zeta potentials of apatite, dolomite, and quartz decrease with the pH increasing among the tested pH range. Some literatures report that isoelectric point (IEP) value of apatite from different deposits changes from 2.0 to 8.0, and the dolomite is around 3.0-6.0, but they can shift in the presence of electrolyte (Yu et al, 1985;Merma et al, 2013;Kasha et al, 2015). Therefore, isoelectric points of apatite and dolomite in 10 mM KCl solutions are observed, but no isoelectric points of quartz are determined around the tested pH range from 3.1 to 10.2.…”

Section: Zeta Potentials Of Apatite Dolomite Quartzmentioning

confidence: 99%

Surface Electrical Behaviors of Apatite, Dolomite, Quartz, and Phosphate Ore

Zhou

Liu

et al. 2020

Front. Mater.

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The phosphate ore flotation is achieved through the surface electrical behavior difference among apatite, dolomite and quartz, but it is usually affected by the dissolved ions from pulp, especially Ca 2+ and Mg 2+ . The zeta potentials of apatite, dolomite, quartz, and phosphate ore in different solutions were measured to discuss the surface electrical behaviors of them in this study. It was found that the apatite, dolomite and phosphate ore supernatants have limited impact on the zeta potentials of the respective surfaces themselves, but the surface electrical behaviors of apatite and dolomite in the supernatant of the other is similar to the supernatant mineral source. This will increase the separation difficulty of apatite from dolomite in the phosphate ore flotation process. The negative zeta potentials of apatite, dolomite, quartz and phosphate ore increase in the presence of Ca 2+ and Mg 2+ . Moreover, a more zeta potential increase in presence of Ca 2+ than Mg 2+ was investigated, suggesting a stronger influence of Ca 2+ than Mg 2+ on the surface electrical behaviors of ores.

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Effect of Ca2+, Mg2+ and SO42− ions on the zeta potential of calcite and dolomite particles aged with stearic acid

Cited by 114 publications

References 43 publications

Effects of Metal Ions on the Flotation of Apatite, Dolomite and Quartz

Effects of Metal Ions on the Flotation of Apatite, Dolomite and Quartz

Zeta potential of intact natural limestone: Impact of potential-determining ions Ca, Mg and SO4

Surface Electrical Behaviors of Apatite, Dolomite, Quartz, and Phosphate Ore

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