The Effect of Sodium Dodecyl Sulfate and M-α-Cyclodextrin on the Solubility and Partitioning of Xylenes in Aqueous Solutions

Andreaus, Jürgen; Draxler, Josef; Marr, Rolf; Lohner, H.

doi:10.1006/jcis.1996.4556

Cited by 14 publications

(10 citation statements)

References 10 publications

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“…Four additional PAHs, anthracene, naphthalene, phenanthrene and pyrene, were studied to test the reliability of the PARAFAC method as well as to check the general validity of eqn (8). The results along with literature values 6,[27][28][29][30][31] for all molecules studied are given in Table 1. Anthracene shows different emission spectra in SDS micelles and water, as recovered by a PAR-AFAC model (Fig.…”

Section: Resultsmentioning

confidence: 96%

Application of PARAFAC to determination of distribution constants and spectra of fluorescent solutes in micellar solutions

Chen¹,

Kenny²

2010

Analyst

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Steady state fluorescence excitation emission matrices (EEMs) and time-resolved fluorescence of biphenyl (BP) and 2,5-diphenyloxazole (PPO) dissolved in aqueous solutions of sodium dodecyl sulfate (SDS) were measured as a function of micelle concentration. Parallel factor analysis (PARAFAC) was applied for the first time to the determination of the distribution of solutes between the bulk aqueous phase and the SDS micellar phase, as well as their excitation and emission spectra in both phases. The raw scores of the PARAFAC analysis, which contain concentration information, are also dependent on photophysical parameters which can change upon micellization of the solute; we have developed a method of isolating accurate concentration values from the scores. The distribution constant of PPO, previously unreported, was found to be (8.8 +/- 0.7) x 10(5) M(-1), while the distribution constant of BP, for which various values have been reported, was found to be (4.5 +/- 0.2) x 10(4) M(-1). BP and PPO both showed weakly phase-dependent excitation and emission spectra. The method was validated by determining distribution constants for anthracene, phenanthrene, naphthalene, and pyrene, all of which showed good agreement with consensus values available in the literature.

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Section: Resultsmentioning

confidence: 96%

Application of PARAFAC to determination of distribution constants and spectra of fluorescent solutes in micellar solutions

Chen¹,

Kenny²

2010

Analyst

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“…Andreaus et al (6) employed methyl-a- This may be because the additional hydrophobic interactions between the cavity of the substituted-CD and the xylenes lead to an increase in complex formation constants and the increased solubility of xylenes in water.…”

Section: Permeation Of Xylene Isomers 475mentioning

confidence: 99%

“…The separation of isomers, such as p-xylene and m-xylene, is difficult to achieve using conventional distillation methods due to their close boiling points and similar volatility. Andreaus et al (6) used methyla-cyclodextrin (M-a-CD) as a facilitating carrier into an o/w/o liquid membrane system. Recently, many membrane techniques have been proposed to separate xylene isomers, including the pervaporation method (1 -4), evapomeation (4), and liquid membranes.…”

Section: Introductionmentioning

confidence: 99%

Permeation of xylene isomers through supported liquid membranes containing cyclodextrins

Lue¹,

Juang²,

Hou³

2002

Separation Science and Technology

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The permeation of p-and m-xylenes through supported liquid membranes (SLM) containing cyclodextrins (CDs) was investigated in this study. Three CDs were used in the experiments, a-CD, b-CD, and hydroxypropyl-b-CD (HP-b-CD). The mass transfer mechanisms with and without facilitating carriers (CDs) were studied individually by applying the solution -diffusion model. The facilitated mass transfer mechanism was elucidated as partitioning of xylenes from the organic phase into an aqueous phase, formation of an inclusion complex with CDs, diffusion of the complex, and extraction into the receiving phase. The formation constants in aqueous solutions for CDs and p-xylene were 1.6-2.4 times higher than that of CDs and m-xylene. The diffusivity coefficient of the xylene -CD complex (D m ) and the 463

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“…(12) studied the extraction of toluene, o-xylene from heptane, and benzyl alcohol from toluene with aqueous cyclodextrins. Although the application to the separation of xylene isomers (10,13) and also benzene was investigated (11), the selective separation of toluene from n-heptane using a CD-containing liquid membrane has not been reported yet.…”

Section: Introductionmentioning

confidence: 98%

Selective Separation of Toluene from n‐Heptane via Emulsion Liquid Membranes Containing Substituted Cyclodextrins as Carrier

Chakraborty

Ivanova-Mitseva

Bart

2006

Separation Science and Technology

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The selective separation of toluene from n-heptane is investigated using unsubstituted a-cyclodextrin (aCD), b-cyclodextrin (bCD) and also with two substituted CDs as a carrier in oil/water/oil-type emulsion liquid membranes. The separation factor for toluene to n-heptane is evaluated from the extraction of an equimolar mixture of toluene and n-heptane. bCD shows the highest selectivity followed by aCD, hydroxypropyl-aCD and hydroxypropyl-bCD. The separation performances, represented by the permeation rate and separation factor, are analyzed systematically by varying the operating parameters: contact time, concentration of carriers, volume fraction of the membrane phase, and the relative amount of solvent. In this paper the effects of carriers and interfacial tension on dispersed phase drop size, internal droplets size, and size distribution are also systematically investigated.

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The Effect of Sodium Dodecyl Sulfate and M-α-Cyclodextrin on the Solubility and Partitioning of Xylenes in Aqueous Solutions

Cited by 14 publications

References 10 publications

Application of PARAFAC to determination of distribution constants and spectra of fluorescent solutes in micellar solutions

Application of PARAFAC to determination of distribution constants and spectra of fluorescent solutes in micellar solutions

Permeation of xylene isomers through supported liquid membranes containing cyclodextrins

Selective Separation of Toluene from n‐Heptane via Emulsion Liquid Membranes Containing Substituted Cyclodextrins as Carrier

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