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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472 EISSN: 1735-1472
Vol. 13, No. 2, 2016, pp. 589-598
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Bioline Code: st16054
Full paper language: English
Document type: Research Article
Document available free of charge
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International Journal of Environment Science and Technology, Vol. 13, No. 2, 2016, pp. 589-598
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Determination of thermodynamics and design parameters for ionic liquid-induced cloud point extraction of Coralene red dye
Bhatt, D. R.; Maheria, K. C. & Parikh, J. K.
Abstract
In the last decade, increasing interest on the use
of aqueous micellar solution has been found in the field of
separation science. The unique physical and chemical
properties of ionic liquids make them most suitable candidates
as an additive with nonionic surfactants in cloud
point extraction. A surfactant-mediated cloud point
extraction process has been adopted for the removal of
Coralene red dye using tetraethyl ammonium tetrafluoroborate
ionic liquid as an additive with nonionic surfactant
Triton X-100. The detailed study on effect of various
operating parameters such as temperature, time, concentration
of surfactant, dye and IL on extraction of dye has
been carried out to find out optimum conditions. The
extraction of dye was found to be increased with temperature,
time, surfactant concentration and IL concentration.
A developed Langmuir isotherm was used to compute the
feed surfactant concentration required for the removal of
Coralene red dye up to an extraction efficiency of 90 %.
The effect of temperature and concentration of surfactant
and dye on various thermodynamic parameters was
examined, and it was found that the values of ΔG0
increased with temperature and decreased with surfactant
and dye concentration. The values of ΔH0 and ΔS0
increased with surfactant concentration and decreased with
dye concentration. The developed approach for IL-assisted
cloud point extraction has proved to be an efficient and
green route for extraction of Coralene red from water
sample.
Keywords
Langmuir isotherm; Nonionic surfactant; Thermodynamic parameter
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