Physicochemical characterisation and flow properties of some bentonite muds

Besq, Anthony; Malfoy, C.; Pantet, Anne; Monnet, P.; Righi, D.

doi:10.1016/s0169-1317(03)00127-3

Cited by 72 publications

(34 citation statements)

References 5 publications

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“…Of particular importance are the changes in their hydraulic permeability, compressibility and water content as a result of the changes in physico-chemical conditions of the feed streams. Although various researchers have reported on clay behaviour as a result of changes in associated aqueous conditions [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16], the study of how these changing conditions in the feed streams affect the structure of the accumulating solid assemblages on the membrane surface under very low-pressure membrane filtration operation is rare.…”

Section: Introductionmentioning

confidence: 99%

Effect of ionic strength and pH on hydraulic properties and structure of accumulating solid assemblages during microfiltration of montmorillonite suspensions

Santiwong

Guan

Waite

2008

Journal of Colloid and Interface Science

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Section: Introductionmentioning

confidence: 99%

Effect of ionic strength and pH on hydraulic properties and structure of accumulating solid assemblages during microfiltration of montmorillonite suspensions

Santiwong

Guan

Waite

2008

Journal of Colloid and Interface Science

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“…This conditions the general rheological behavior of suspensions (Besq et al, 2003), in particular those in which these morphologies originated. Two main factors determine this behavior: the colloidal properties due to the three-dimensional organization of the crystallites in water (Paumier et al, 2008) and the nature of clay minerals.…”

Section: Micro-morphology Characterizationmentioning

confidence: 88%

Features and evolution of slip structures in badlands areas (SE Spain)

Díaz-Hernández

Yepes

Díaz

et al. 2015

CATENA

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“…They display varying rheological properties that are highly dependent on the nature of the smectite (layer charge, localization of the layer charge, nature of exchangeable cations, particle size, etc. ), suspension preparation, concentration, pH, ionic strength, and so forth [2].…”

Section: Introductionmentioning

confidence: 99%

“…Smectite layers, that have negative charge, are surrounded by a double diffuse layer (DDL), containing cations to balance the negative charge. The calcium smectite platelets are aggregated into quasicrystals with a thin DDL, in contrast sodium saturated smectites often are isolated platelets with large DDL [2][3][4][5][6][7][8][9][10][11]. Despite this knowledge, the comparison of rheological parameters, even for similar materials like sodium bentonite, as determined by different authors is difficult because experimental conditions are slightly different and also because the cation exchange is not a simple answer.…”

Section: Introductionmentioning

confidence: 99%

Rheological Behavior of Smectite Dispersions: The Influence of Suspension Concentration and Exchangeable Cation

Paumier

Monnet

Pantet

2008

Research Letters in Materials Science

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The mechanical behaviors of smectite materials in water are very sensitive to many parameters, such as concentration, particle size and morphology, exchangeable cation nature, and chemical environment (pH, ionic strength). The literature usually provides general rules for sodium and calcium bentonites. However, it appears that the quantitative results present a large range of values. This study has established the relationships between the smectite nature (mineralogy, morphology, reactivity) and its rheological behavior according to the exchangeable cation. To develop a complete rheological study, we need 800 g of montmorillonite purified and saturated with Na + or Ca 2+ . Huge production necessitates optimized process with accurate control of the powder quality and the chemical environment. Smectite particles have been extracted from a natural bentonite and then saturated with sodium or calcium. Then, each sample was characterized with classical methods like X-ray diffractometry (XRD), and laser granulometry but also cutting-edge technologies like scanning transmission electron microscopy on wet samples (Wet STEM). The Na-smectite dispersion contains a lot of small units whereas the Ca-smectite dispersion contains a few large units. Rheological study consists in flow curves obtained with a high-resolution rheometer. Logarithmic representation of the rheograms permits detecting a yield stress, it separates solid and fluid behavior. The rheological datas (viscosity, consistency, and yield stress) allow defining the limits depending on the concentration and on the saturation state. A Newtonian law could be applied to around 4% for Na-and Casmectites. Seaward of these concentrations, the dispersions are shear thinning and modelled by Ostwald law. Finally a yield stress appears at 6% for Na-smectite and 11% for Ca-smectite, the flow curves could be modelled by Hershel-Bukley law. Results are in accordance with the bibliography.

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Physicochemical characterisation and flow properties of some bentonite muds

Cited by 72 publications

References 5 publications

Effect of ionic strength and pH on hydraulic properties and structure of accumulating solid assemblages during microfiltration of montmorillonite suspensions

Effect of ionic strength and pH on hydraulic properties and structure of accumulating solid assemblages during microfiltration of montmorillonite suspensions

Features and evolution of slip structures in badlands areas (SE Spain)

Rheological Behavior of Smectite Dispersions: The Influence of Suspension Concentration and Exchangeable Cation

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