Elimination of fuel spills from effluent using cloud point extraction methods

Ghouas, Halima; Haddou, Boumediene; Bouabdesselam, Hassiba; Bouberka, Zohra

doi:10.1016/j.jhazmat.2010.04.012

Cited by 9 publications

(6 citation statements)

References 52 publications

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“…6 and 7) that Na 2 SO 4 improves the extraction extent (from 60.5 % to 81.34 %) and reduces the volume fraction of coacervate (from 0.05 to 0.02). These results are in good agreement with the literature [37][38][39][40][41][42][43].…”

Section: Effect Of Saltsupporting

confidence: 93%

“…Adding salt to an aqueous system can increase the incompatibility between the water structure in hydration shells of ions and surfactant molecules, which can reduce the concentration of "free water" in the coacervate and, consequently, reduce the volume of the phase [37][38][39][40][41][42][43]. Now, SO 4 2− is more effective in this respect than Cl − , and the behaviors of NaCl and Na 2 SO 4 have been compared [38].…”

Section: Effect Of Saltmentioning

confidence: 99%

“…It was then extended to the extraction of proteins, enzymes, and other biological substances [35]. Then, many authors highlighted the effectiveness of CPE for the elimination of organic pollutants [36][37][38][39][40][41][42][43][44].…”

Section: Introductionmentioning

confidence: 99%

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Cloud point extraction of Δ9-tetrahydrocannabinol from cannabis resin

et al. 2013

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A cloud point extraction coupled with high performance liquid chromatography (HPLC/UV) method was developed for the determination of Δ(9)-tetrahydrocannabinol (THC) in micellar phase. The nonionic surfactant "Dowfax 20B102" was used to extract and pre-concentrate THC from cannabis resin, prior to its determination with a HPLC-UV system (diode array detector) with isocratic elution. The parameters and variables affecting the extraction were investigated. Under optimum conditions (1 wt.% Dowfax 20B102, 1 wt.% Na2SO4, T = 318 K, t = 30 min), this method yielded a quite satisfactory recovery rate (~81 %). The limit of detection was 0.04 μg mL(-1), and the relative standard deviation was less than 2 %. Compared with conventional solid-liquid extraction, this new method avoids the use of volatile organic solvents, therefore is environmentally safer.

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Section: Effect Of Saltsupporting

confidence: 93%

Section: Effect Of Saltmentioning

confidence: 99%

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Cloud point extraction of Δ9-tetrahydrocannabinol from cannabis resin

et al. 2013

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“…This increase in volume of the coacervate is also associated with the retention of water molecules by the hydrophilic groups of TX-114 and Lutensol ON 30. This observation was also made in previous studies using other micellar systems [49,50,61,62,71,[73][74][75]. So, it is advantageous to use less surfactant to have a smaller volume of coacervate.…”

Section: Concentration Of Residual Surfactant (X Tw )supporting

confidence: 73%

Removal of Tannic Acid From Aqueous Solution by Cloud Point Extraction and Investigation of Surfactant Regeneration by Microemulsion Extraction

Ghouas

Haddou

Kameche

et al. 2015

J Surfact & Detergents

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The aim of this work is the extraction of tannic acid (TA) with two commercial nonionic surfactants, separately: Lutensol ON 30 and Triton X‐114 (TX‐114).The experimental cloud point extraction results are expressed by four responses to surfactant concentration and temperature variations: extent of TA extraction (E), remaining solute (Xs,w) and surfactant (Xt,w) concentrations in dilute phase and volume fraction of coacervate (Φc) at equilibrium. An empirical smoothing method was used and the results are represented on three dimensional plots. In optimal conditions, the extraction extent of TA reaches 95 and 87 % using TX‐114 and Lutensol ON 30, respectively. Sodium sulfate, cetyltrimethylammonium bromide (CTAB) addition and pH effect are also studied. Finally, the possibility of recycling of the surfactant is proved.

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“…This phenomenon can be suggested by the monolayer coverage of the solute on the surface of the micelles [17]. Cloud point extraction, as observed by several authors, is an effective technique for removing dissolved organic contaminants from wastewater and groundwater [17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 91%