Surface Tension Effects in the Sedimentation of Coal Particles in Various Liquid Mixtures

Vargha-Butler, E.I.; Zubovits, T.K.; Absolom, D. R.; Neumann, A. W.; Hamza, Hassan

doi:10.1080/00986448508911174

Cited by 32 publications

(5 citation statements)

References 8 publications

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“…According to the sedimentation volume method proposed by Vargha-Butlerr et al [15], the propensity of solid particles to either aggregate or stay apart on the sedimentation process may be used to determine their affinity to the solvent and their relative hydrophobic/hydrophilic character. The more hydrophobic (hydrophilic) solid the more compact sediment it will form in a polar (non-polar) solvent.…”

Section: Hydrophobicity/hydrophilicitymentioning

confidence: 99%

“…The concept of hydrophilic coefficient was previously used to characterize the relative hydrophilicity of inorganic fillers [18]. The sedimentation volume method of Vargha-Butler [15] can be used also to determine the solideliquid surface tension. For this purpose sedimentation volume has to be measured in a series of liquideliquid (like water and ethanol) mixtures with incremental change of a gaseliquid surface tension.…”

Section: Hydrophobicity/hydrophilicitymentioning

confidence: 99%

See 1 more Smart Citation

Ionic liquid-functionalized crystals of barium sulfate: A hybrid organic–inorganic material with tuned hydrophilicity and solid–liquid behavior

Kowacz

Marchel

Esperança

et al. 2015

Materials Chemistry and Physics

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Section: Hydrophobicity/hydrophilicitymentioning

confidence: 99%

Section: Hydrophobicity/hydrophilicitymentioning

confidence: 99%

Ionic liquid-functionalized crystals of barium sulfate: A hybrid organic–inorganic material with tuned hydrophilicity and solid–liquid behavior

Kowacz

Marchel

Esperança

et al. 2015

Materials Chemistry and Physics

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“…Free ions also compete for retention sites with mobile charged surfaces [ Makin and Beveridge , 1996]. These may affect the extent of the hydrophobic or hydrophilic behavior of charged particles [ Vargha‐Butler et al , 1985] and their interaction with any air‐water interface [ Powelson and Mills , 1996].…”

Section: Introductionmentioning

confidence: 99%

Analysis of matrix effects critical to microbial transport in organic waste‐affected soils across laboratory and field scales

Unc¹,

Goss²,

Cook³

et al. 2012

Water Resources Research

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Organic waste applications to soil (manure, various wastewaters, and biosolids) are among the most significant sources of bacterial contamination in surface and groundwater. Transport of bacteria through the vadose zone depends on flow path geometry and stability and is mitigated by interaction between soil, soil solution, air‐water interfaces, and characteristics of microbial surfaces. After initial entry, the transport through soil depends on continued entrainment of bacteria and resuspension of those retained in the porous structure. We evaluated the retention of bacteria‐sized artificial microspheres, varying in diameter and surface charge and applied in different suspending solutions, by a range of sieved soils contained in minicolumns, the transport of hydrophobic bacteria‐sized microspheres through undisturbed soil columns as affected by waste type under simulated rainfall, and the field‐scale transport of Enterococcus spp. to an unconfined sandy aquifer after the application of liquid manure. Microsphere retention reflected microsphere properties. The soil type and suspending solution affected retention of hydrophilic but not hydrophobic particles. Retention was not necessarily facilitated by manure‐microsphere‐soil interactions but by manure‐soil interactions. Undisturbed column studies confirmed the governing role of waste type on vadose‐zone microsphere transport. Filtration theory applied as an integrated analysis of transport across length scales showed that effective collision efficiency depended on the distance of travel. It followed a power law behavior with the power coefficient varying from ∼0.4 over short distances to >0.9 over 1 m (i.e., very little filtration for a finite fraction of biocolloids), consistent with reduced influence of soil solution and biocolloid properties at longer travel distances.

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“…Surface energies are of great importance in a wide range of problems in surface science. There is no direct method for the measurement of surface tensions involving a solid phase, and hence, indirect methods are called for; they include contact angle measurements for different liquids [1][2][3][4][5][6][7], direct force measurements [8][9][10][11][12][13][14], solidification front techniques [15][16][17][18][19][20][21], film flotation [22][23][24][25], sedimentation techniques [26][27][28][29], gradiant theory [30][31][32], and the Lifshitz theory of van der Waals forces [32][33][34][35]. Among these methods, the contact angle approach is believed to be the simplest for determination of solid surface tensions.…”

Section: Introductionmentioning

confidence: 99%

Contact angle measurements with liquids consisting of bulky molecules

Tavana

Lam

Grundke

et al. 2004

Journal of Colloid and Interface Science

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Surface Tension Effects in the Sedimentation of Coal Particles in Various Liquid Mixtures

Cited by 32 publications

References 8 publications

Ionic liquid-functionalized crystals of barium sulfate: A hybrid organic–inorganic material with tuned hydrophilicity and solid–liquid behavior

Ionic liquid-functionalized crystals of barium sulfate: A hybrid organic–inorganic material with tuned hydrophilicity and solid–liquid behavior

Analysis of matrix effects critical to microbial transport in organic waste‐affected soils across laboratory and field scales

Contact angle measurements with liquids consisting of bulky molecules

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