Study of changes in conductivity and spectral behaviour before and after micelle formation in the dye-surfactant system

Muntaha, Sidra Tul; Khan, Muhammad Aqeel

doi:10.1016/j.molliq.2014.05.008

Cited by 36 publications

(21 citation statements)

References 16 publications

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“…From the plot, it is also inferred that the dyeesurfactant interaction is favorable at low temperature. The similar behavior is also observed in the case of interaction of NR with SDS (Muntaha and Khan, 2014).…”

Section: Conductance Measurementsupporting

confidence: 81%

“…The theoretical model Span, 2000, 2001;Khan and Sarwar, 2006;Muntaha and Khan, 2014) was implied for the determination of thermodynamic parameters for NReSNS and NReSDS ion pair formation; the parameters are expressed in Table 3. Table 3 represents the values of equilibrium constant "K" and Gibbs free energy "DG 0 " for both NReSDS and NReSNS ion pair formation.…”

Section: Thermodynamic Parametersmentioning

confidence: 99%

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Natural surfactant extracted from Sapindus mukurossi as an eco-friendly alternate to synthetic surfactant – a dye surfactant interaction study

Muntaha

Khan

2015

Journal of Cleaner Production

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Section: Conductance Measurementsupporting

confidence: 81%

Section: Thermodynamic Parametersmentioning

confidence: 99%

Natural surfactant extracted from Sapindus mukurossi as an eco-friendly alternate to synthetic surfactant – a dye surfactant interaction study

Muntaha

Khan

2015

Journal of Cleaner Production

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“…These aggregates do not carry on for a long time and are broken due to the adsorption of Co 2+ molecules at the micellar surface at the CMC point. At CMC, due to the Co 2+ adsorption in newly made micelles, the absorbance does not achieve a constant value but increases slowly [ 42 ].…”

Section: Resultsmentioning

confidence: 99%

Highly Selective Methodology for Entrapment and Subsequent Removal of Cobalt (II) Ions under Optimized Conditions by Micellar-Enhanced Ultrafiltration

et al. 2022

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Micellar-enhanced ultrafiltration (MEUF), being a separation technique, was used to remove cobalt metal ion (Co2+) from their aqueous solutions in an application to reduce the toxicity level from industrial effluents using a micellar solution of anionic and cationic surfactants. The metal ions were first adsorbed by using anionic surfactants, i.e., sodium dodecyl sulfate (SDS) and sodium oleate (SO). The calculations for partition (Kx) and binding constants (Kb) and their respective free energy of partition and binding (ΔGp and ΔGb kJmol−1) helped significantly to find out the extent of binding or interaction of Co2+ with the surfactant and ΔGp and ΔGb were found to be −29.50 and −19.38 kJmol−1 for SDS and −23.95 and −12.67 kJmol−1 in the case of SO. MEUF work was also performed to find out the optimal conditions to remove metal pollutants from the aqueous system. For the said purpose, various factors and concentrations effect were studied, such as the concentration of the surfactant, concentration of the electrolyte (NaCl), transmembrane pressure, RPM, and pH. The efficiency of this process was checked by calculating various parameters, such as rejection percentage (R%) and permeate flux (J). A maximum rejection of 99.95% with SDS and 99.99% with SO was attained.

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“…The interaction between surfactant and dye in solution occur between individual molecules (or ions), or between dye molecules (or ions) and surfactant micelles (or reverse micelles), vesicles (or polymer vesicles), bilayer lipid membranes, or multilayer casting membranes. 9–11 In most cases, the dye and surfactant molecules associate, resulting in solubility, change in absorption spectra, and dyeing properties. 12–15 This association is influenced by electrostatic forces, hydrogen bonding, van der Waals force, and entropy change.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics and Kinetic Investigations on the Interactions between Malachite Green and Cetyltrimethylammonium Bromide

Yan¹,

Juan²,

Wang³

et al. 2018

aatcc j res

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Malachite green (MG) is a widely-used textile dye. It fades in the presence of the cationic surfactant cetyltrimethylammonium bromide (CTAB) in aqueous solutions and in oil/water/surfactant microemulsions. The surfactant was treated as a reactant in this study, as there were direct interactions between MG and CTAB in these solutions. By measuring the absorbance of different MG aqueous solutions and microemulsions at the maximum absorbance wavelength, and using the appropriate association models to analyze the experimental data, a good linear relationship was observed between MG and CTAB. Association constants were obtained and the value of the thermodynamics function of association ΔrGm was calculated. It was concluded from these results that microemulsion formation had an inhibitory effect on the association reaction.

show abstract

Study of changes in conductivity and spectral behaviour before and after micelle formation in the dye-surfactant system

Cited by 36 publications

References 16 publications

Natural surfactant extracted from Sapindus mukurossi as an eco-friendly alternate to synthetic surfactant – a dye surfactant interaction study

Natural surfactant extracted from Sapindus mukurossi as an eco-friendly alternate to synthetic surfactant – a dye surfactant interaction study

Highly Selective Methodology for Entrapment and Subsequent Removal of Cobalt (II) Ions under Optimized Conditions by Micellar-Enhanced Ultrafiltration

Thermodynamics and Kinetic Investigations on the Interactions between Malachite Green and Cetyltrimethylammonium Bromide

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