Application of Langmuir isotherm to saturated fatty acid adsorption

Bayrak, Yüksel

doi:10.1016/j.micromeso.2005.08.009

Cited by 47 publications

(27 citation statements)

References 16 publications

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“…The model compounds have been mixed with clay minerals, such as montmorillonite, illite, and kaolinite, to investigate the thermal degradation of organics and hydrocarbon generation in the clay-organic complex Faure et al, 2006;Johns, 1979;Shimoyama and Johns, 1971;Zhang et al, 2008). However, several reports pointed out that the intercalation of those compounds into the abovementioned clay minerals cannot occur under the applied conditions (Bayrak, 2006;Drouin et al, 2010). Therefore, it is meaningful to investigate the thermal degradation of organic matters within the interlayer space of clay minerals.…”

Section: Introductionmentioning

confidence: 99%

Thermal degradation of organic matter in the interlayer clay–organic complex: A TG-FTIR study on a montmorillonite/12-aminolauric acid system

Liu

Yuan

Qin

et al. 2013

Applied Clay Science

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Section: Introductionmentioning

confidence: 99%

Thermal degradation of organic matter in the interlayer clay–organic complex: A TG-FTIR study on a montmorillonite/12-aminolauric acid system

Liu

Yuan

Qin

et al. 2013

Applied Clay Science

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“…Previously, few studies demonstrated the adsorption of fatty acids on clay minerals (Meyers and Quinn 1971a, Meyers and Quinn 1973, Balistrieri and Murray 1987, Bayrak 2006, Gautier et al 2009, Drouin et al 2010) and a few simulation studies were conducted by mixing of clay minerals and fatty acids (Nierop and van Bergen 2002, Faure et al 2006a, Faure et al 2006b). The number of these studies is limited especially in aqueous solution due to the solubility limitations of carboxylic acids in water.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Adsorption of tetradecanoic acid on kaolinite minerals: Using flash pyrolysis to characterise the catalytic efficiency of clay mineral adsorbed fatty acids

Zafar

Watson

2017

Chemical Geology

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“…80 μN/m for 20 μm diameter polystyrene particles [67]. The authors concluded that the adsorption force was mainly governed by Van der Waals forces [68,69]. These forces are not strong enough for explaining strong retentions in HPLC columns.…”

Section: Revision Of Traditional Approaches For Rplc Mechanismmentioning

confidence: 99%

Reverse-High Performance Liquid Chromatography Mechanism Explained by Polarization of Stationary Phase

Andrade-Eiroa¹

2011

CheM

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Original results and conclusions on Reverse Phase High Performance Liquid Chromatography (RPLC) mechanism are here presented. So far, none of the theoretical approaches applied to the RPLC mechanism can explain the retention and elution mechanisms of most of the analytes by RPLC, especially neutral organic compounds. Our experiences allowed us to state that RPLC retention mechanism most likely occurs through polarization of stationary phase (usually dielectric surfaces) submerged into solvents with huge dielectric constant and high dipole moment (i.e. water and/or acetonitrile) at high pressures as those applied in RPLC systems. The surface polarized interacts with polarizable target analytes (i.e. naphthalene, pyrene or benzo(ghi)perylene) in such a way that the retention depends on the medium polarizability of the target compound. The higher is the medium polarizability of the compound retained the higher is its retention time.By using Polycyclic Aromatic Hydro-carbons (PAHs) and 6-nitrochrysene as probes, we found that although the dependence of retention times on pressure is not evident in most cases, the interaction between pressure and the mobile phase dipole moment is evidenced at the light of the constructed mathematical models. Two very different cases can be distinguished:1. On one hand, when low dipole moment mobile phases are used, high pressure means big work developed by the system in such a way that high pressures inside the system reduce retention times compared to low pressures.2. On the another one, when high dipole moment solvents are used as mobile phase, high pressure entails an outstanding increase of the retention times compared to low dipole moment mobile phases. This is most likely due to high pressures that entail closer alignment of mobile phase dipoles and lesser tilt of them, originating an outstanding electric field inside the analytical column.In addition to this, reduced retention times for dipole solutes (6-nitrochrysene, dipole molecule) compared to non-polar solutes (PAHs) were observed when pressure drops. This conclusions would allow to extend the model to basic/acid molecules at different pH. In this case, electrostatic repulsions among analyte molecules should be considered.

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Application of Langmuir isotherm to saturated fatty acid adsorption

Cited by 47 publications

References 16 publications

Thermal degradation of organic matter in the interlayer clay–organic complex: A TG-FTIR study on a montmorillonite/12-aminolauric acid system

Thermal degradation of organic matter in the interlayer clay–organic complex: A TG-FTIR study on a montmorillonite/12-aminolauric acid system

Adsorption of tetradecanoic acid on kaolinite minerals: Using flash pyrolysis to characterise the catalytic efficiency of clay mineral adsorbed fatty acids

Reverse-High Performance Liquid Chromatography Mechanism Explained by Polarization of Stationary Phase

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