Research paper
Effect of pretreatment of the electrokinetic properties of quartz

https://doi.org/10.1016/0301-7516(77)90018-7Get rights and content

Abstract

Effects of various commonly used pretreatments such as desliming, ultrasonic scrubbing and leaching with dilute nitric, hydrofluoric and sodium hydroxide solutions on the electrokinetic properties of quartz in aqueous solutions are reported. The study showed that treatments with various reagents often used in mineral processing research in the past to clean minerals can affect, sometimes severly, the electrokinetic properties of quartz. The change in these properties during subsequent aging is also found to be governed by the type of treatment used. This study also shows the need in mineral research for standardization of mineral preparation techniques in order that the discrepancy in data reported for surface properties in literature can be minimized.

References (12)

There are more references available in the full text version of this article.

Cited by (23)

  • Cryo-XPS – A new technique for the quantitative analysis of the structure of electric double layer at colloidal particles?

    2020, Colloids and Surfaces A: Physicochemical and Engineering Aspects
    Citation Excerpt :

    An analogous coagulation kinetics analysis was made using data obtained by other researchers for basic, i.e. positively charged nonporous near-spherical colloids of hematite [19]. The analysis revealed facts that give the above rigid surface porous layer a new physico-chemical background having a potential to unify all colloidal manifestations of silica and, perhaps, all metal oxides: (i) a gel layer is predicted to exist even on the nonporous, relatively strongly charged surface of silica when pH of the solution is at least 6.0, i.e. far from pHPZC; this conforms with electrokinetic studies that indicate the gel layer on the surface of quartz and glass [20–23]. ( ii) this gel layer deswells since the shell thickness as a function of the electrolyte concentration decreases according to a simple theoretical scaling power law predicted for ion-penetrable and swellable polyelectrolyte gels.

  • Colloidal stability-slip casting behavior relationship in slurry of mullite synthesized by the USP method

    2012, Ceramics International
    Citation Excerpt :

    Another plausible explanation for this divergence could be any contamination of the surface of mullite powders during production or pretreatments during ZP measurements. According to the relevant literature such a surface contamination may lead to vary the IEPs of mineral powders [41]. On the other hand, the zeta potential increases sharply with decrease in pH from zero mV at pH 8.9 to the about 50–60 mV at about pH 6 depending on the ionic strength of the medium due to dissociation of –MOH (where M symbolizes Si or Al) groups or proton (H+) adsorption on these groups, e.g.[–MOH + H+ → –MOH2+ ↔ –M+ + H2O]

  • Pressure solution - The importance of the electrochemical surface potentials

    2011, Geochimica et Cosmochimica Acta
    Citation Excerpt :

    Specific binding, ion exchange and local dissolution at the surface take a much longer time compared with the diffusion of ions in the thin interfacial water film and are the effective rate-limiting steps. After the solution and/or surface conditions have changed, it may take as long as several hours for the surface charge/potential of quartz surfaces to reequilibrate (Kulkarni and Somasundaran, 1977). Therefore the pressure solution process is reaction-limited rather than diffusion-limited for the grain-grain contacts in our experiments (Greene et al., 2009).

View all citing articles on Scopus
View full text