Improved dewatering behavior of clay minerals dispersions via interfacial chemistry and particle interactions optimization

McFarlane, Angus; Bremmell, Kristin Elizabeth; Addai‐Mensah, Jonas

doi:10.1016/j.jcis.2005.06.034

Cited by 75 publications

(30 citation statements)

References 29 publications

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“…However, the two different types of charges of smectite surface, permanent negative charge on the plate face and the pH-dependent charges at the edges, determine the electrophoretic mobility [28,29]. According to the values given in Table 2, RS, Na-S and HDTMA-smectites at low concentrations (0.5CEC and 1.0CECHDTMA-S) have negative electrophoretic mobilities under all pHs and appear to be dominated by the permanently negatively charged siloxane basal face [82]. However, the electrophoretic mobility values of 1.5CEC-, 2.0CEC-, 2.5CEC-and 3.0CECHDTMA-S suspensions shifted to positive values.…”

Section: Electrophoretic Mobility Measurementsmentioning

confidence: 99%

Structural characterization of hexadecyltrimethylammonium-smectite composites and their potentiometric electrode applications

Çubuk

Çağlar

Topçu

et al. 2015

Applied Surface Science

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Section: Electrophoretic Mobility Measurementsmentioning

confidence: 99%

Structural characterization of hexadecyltrimethylammonium-smectite composites and their potentiometric electrode applications

Çubuk

Çağlar

Topçu

et al. 2015

Applied Surface Science

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“…Former studies (Abend and Lagaly, 2000;Amorós et al, 2002;Mpofu et al, 2003;Rasteiro and Salgueiros, 2005;McFarlane et al, 2006;Faers et al, 2006) showed the effect of solution chemistry on the rheological behaviour of solid dispersions. With reference to the oil sands extraction process, Wallace et al (2004) showed the impact of aqueous phase composition on bitumen recovery in the presence of fine solids.…”

Section: Introductionmentioning

confidence: 99%

Effect of particle size on the rheology of Athabasca clay suspensions

Adeyinka

Samiei

et al. 2009

Can J Chem Eng

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The success of the separation process conventionally used in Alberta for oil sands extraction is highly influenced by the rheology of the oil sands slurry. In the gravity separation vessel, high slurry viscosities can hinder the rise of aerated bitumen and reduce the efficiency of the recovery process. In this study, the effect of particle size on the viscosity of oil sands slurries is investigated. Solids from mature fine tails (MFT) obtained from tailings pond were fractionated into three fractions of different particle size distributions and their rheological properties were studied. The solids in each fraction were characterized by XRD analysis which showed the presence of different types of clays in each fraction. For the rheological measurements, dispersions of the three fractions were prepared in the supernatant water decanted from centrifuged MFT to maintain the solution chemistry of the solids. Suspensions of each fraction showed a non-Newtonian shear thinning behaviour as well as yield stress that is characteristic of structure formation within the suspensions. For all solids fractions, increasing solids concentration led to higher viscosities and higher yield stress values. Viscoelastic properties of the suspensions showed stronger solid-like behaviour at higher particle concentrations. Among the three fractions numbered from 1 to 3, solids in fraction 3 were coated with organic matters, exhibiting the highest suspension viscosities. Also for fraction 3, higher gelling potency was observed at much lower weight fractions of solids as compared to the other fractions.La réussite du processus de séparation normalement utilisé en Alberta pour l'extraction du pétroleà partir de sables bitumineux est fortement influencée par la rhéologie de la boue des sables bitumineux. Dans le récipient de séparation par gravité, les viscositésélevées de la boue peuvent empêcher la remontée du bitume cellulaire et réduire l'efficacité du procédé d'extraction. Dans le cadre de cetteétude, l'effet de la dimension des particules sur la viscosité des boues de sables bitumineux est analysé de près. Les solides provenant des résidus fins mûrs (RFM) obtenus des bassins de résidus ontété fractionnés en trois fractions de granulométrie des particules différentes et leurs propriétés rhéologiques ontétéétudiées. Les solides de chacune des fractions ontété caractérisés au moyen d'une analyse diffractométrique qui a révélé la présence de différents types d'argiles dans chacune des fractions. Pour ce qui est des mesures rhéologiques, des dispersions des trois fractions ontété préparées dans l'eau surnageante décantéeà partir des RFM centrifugés afin de maintenir la chimométrie des solides. Les suspensions de chaque fraction ont montré un comportement de fluidisation par cisaillement non newtonien, de même qu'une contrainte d'écoulement qui est typique de la formation de structureà l'intérieur des suspensions. Pour toutes les fractions de solides, l'augmentation de la concentration de solides a entraîné des viscosités et des valeurs de co...

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“…b0.1 m h − 1 ), low sediment solid loading (b10 wt.%) and increased shear yield stress, the latter which may lessen compact consolidation (McFarlane et al, 2006). With the addition of polymer flocculant, flocculated kaolinite and smectite typically consolidates to 20-22 wt.% solid (McFarlane et al, 2006).…”

Section: Introductionmentioning

confidence: 99%