Heterogeneous dissolution of benzo(a)pyrene by surfactant solutions

Dur, Jeanne-Chantal; Rama, Rachel; Parola, Hélène; Chaplain, Véronique

doi:10.1016/s0927-7757(99)00244-7

Cited by 8 publications

(5 citation statements)

References 15 publications

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“…This behavior is interpreted as a “retention” of the solute by the micelle, modelized by several authors as an extraction in the micellar volume , using the pseudo phase model or as an adsorption supposing that i is located on the surface of the micelle or as a fixation in the superficial layer of the micelle. , Thermodynamics does not allow any conclusion about the real nature of the phenomena or the physical reality of the retention. It simply establishes the interdependence of the variables μ i and n 2 .…”

Section: Reactivity In Micellar Medium; Thermodynamic and Kinetic Poi...mentioning

confidence: 99%

“…Above the cmc, this equation is of particular interest in view of a decrease of the chemical potential of i with the addition of 2 in solution, the values of the variables n i , n 1 , T, P, and A being kept constant. This behavior is interpreted as a "retention" of the solute by the micelle, modelized by several authors as an extraction in the micellar volume 23,24 using the pseudo phase model or as an adsorption supposing that i is located on the surface of the micelle 25 or as a fixation in the superficial layer of the micelle. 26,27 Thermodynamics does not allow any conclusion about the real nature of the phenomena or the physical reality of the retention.…”

Section: Reactivity In Micellar Medium; Thermodynamic and Kinetic Poi...mentioning

confidence: 99%

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Thermodynamic and Kinetic Approach of the Reactivity in Micellar Media. Reaction of 1,3,5-Trinitrobenzene upon Hydroxide Ion in Aqueous Solutions of Cationic Surfactants

et al. 2001

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The kinetics of the reaction of OHwith 1,3,5-trinitrobenzene in the presence of dodecyl and hexadecyltrimethylammonium bromide have been studied. The micellar effects on this reaction have been modelized with the help of a new thermodynamic and kinetic analysis. This modelization has been based on a profitable approach proposed by De Donder and Defay which is well suited to the kinetics in dispersed medium. The chemical exchange rates σ V 0 and b V 0 , which are, respectively, the micellar and the bulk exchange rates, have been determined. This report also reveals that the acceleration of chemical reactions is mainly due not only to a large increase of the chemical exchange rate on the micellar aggregates but also to the high stabilization of the activated complex.

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Section: Reactivity In Micellar Medium; Thermodynamic and Kinetic Poi...mentioning

confidence: 99%

Section: Reactivity In Micellar Medium; Thermodynamic and Kinetic Poi...mentioning

confidence: 99%

Thermodynamic and Kinetic Approach of the Reactivity in Micellar Media. Reaction of 1,3,5-Trinitrobenzene upon Hydroxide Ion in Aqueous Solutions of Cationic Surfactants

et al. 2001

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“…Bioavailability can be improved by using surfactant, in order to enhance fungal transformation, without inducing losses due to abiotic leaching. Physico-chemical studies are under progress to define the most efficient surfactants in the soil, as well as their application conditions 35 .…”

Section: Discussionmentioning

confidence: 99%

Inoculation of Filamentous Fungi in Manufactured Gas Plant Site Soils and PAH Transformation

Rama¹,

Sigoillot²,

Chaplain

et al. 2001

Polycyclic Aromatic Compounds

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Solid carriers have been developed to inoculate Trametes versicolor andCunninghamella elegans into manufactured gas plant site soils. Pelleted wheat bran carriers were very efficient in stimulating the growth of fungi in an industrial soil containing about 2800 mg kg -1 PAHs. Fungal biomass and activity of extracellular laccases, enzymes produced by T. versicolor as markers of metabolic activity in the contaminated soil, both decreased after 2 weeks of incubation. Supplementing the soil with a mixture of carbon, nitrogen and phosphorus enhanced the fungal activity period.A 38% decrease of solvent extractable PAHs was observed in manufactured gas plant site soils when supplemented with T. versicolor, Glucidex 19 TM , ammonium nitrate, lime phosphate and Montanox 80 TM , after 20 weeks. Then, the degradation proceeded more slowly during the following 30 weeks, and reached 43% of initial extractable PAHs. Some factors governing a limited PAH biotransformation in the soil are discussed.

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“…They are made of two or more fused benzene rings formed mainly from the combustion of fossil fuels and are always found as a mixture of individual compounds. They are of special interest because (i) they are known or suspected carcinogens or mutagens and (ii) they strongly adsorb to soil sediments making them persist in the soil for extended periods of time [2][3][4][5][6][7]. As a consequence, remediation of PAHs in soil-water system is often dependent on desorption of the contaminant from the soil surface and its subsequent incorporation into the bulk aqueous phase.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Surface and Solution Properties of Gemini -conventional Surfactant Mixtures on Solubilization of Polycyclic Aromatic Hydrocarbon

Kamil¹,

Siddiqui²

2013

MNSMS

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Experimental data are presented on the enhanced solubilities of fluorene (FLR) resulting from solubilization in aqueous solutions of two conventional surfactants: cationic cetyltrimethylammonium bromide (CTAB) , anionic sodium dodecyl sulfate (SDS), nonioinic polyethylene glycol dodecyl ether (Brij35) and a cationic gemini bis (hexadecyldimethylammonium) pentane dibromide (G5). The critical micellar concentration of surfactants was determined by surface tension measurements and aqueous solubilities of fluorene compound in surfactant solutions were measured spectrophotometrically. Solubilization of PAH compound commenced at the surfactant critical micelle concentration and was proportional to the concentration of surfactant in micelle. The results of the mixed systems were analyzed with the help of regular solution theory, in which the deviation of CMC exp values for mixed surfactant systems from CMC ideal was measured by evaluating the interaction parameter, β m. Negative values of β m were observed in all equimolar binary systems which show synergism in the mixed micelle. Attraction force between two oppositely charged head groups lead the strongest synergism effect between cationic gemini and anionic conventional surfactant. In addition to molar solubilization ratio (MSR) solubilization efficiency is also quantified in terms of micelle-water partition coefficient (K m).

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Heterogeneous dissolution of benzo(a)pyrene by surfactant solutions

Cited by 8 publications

References 15 publications

Thermodynamic and Kinetic Approach of the Reactivity in Micellar Media. Reaction of 1,3,5-Trinitrobenzene upon Hydroxide Ion in Aqueous Solutions of Cationic Surfactants

Thermodynamic and Kinetic Approach of the Reactivity in Micellar Media. Reaction of 1,3,5-Trinitrobenzene upon Hydroxide Ion in Aqueous Solutions of Cationic Surfactants

Inoculation of Filamentous Fungi in Manufactured Gas Plant Site Soils and PAH Transformation

Experimental Study of Surface and Solution Properties of Gemini -conventional Surfactant Mixtures on Solubilization of Polycyclic Aromatic Hydrocarbon

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