Abstract
In the present study, a cloud-point extraction process has been developed to remove crystal violet dye using two different non-ionic surfactants, Tergitol NP-7 and Triton X-114. For different concentrations of dye and surfactant, cloud-point temperatures were determined for Tergitol NP-7 and Triton X-114. The effectiveness of two different surfactants, Triton X-114 and Tergitol NP-7, for the removal of dye from synthetic solution was investigated. The effects of surfactant and dye concentrations, as well as operating temperature on phase volume ratio, preconcentration factor, distribution coefficient, and extraction efficiency were studied. The optimum dosage of surfactant can be 0.05 M for both surfactants for removing crystal violet. The results showed that 97 % of crystal violet can quantitatively be removed by cloud-point extraction at 0.05 M surfactant concentration in a single extraction. The performance of Tergitol NP-7 was found to be more effective than Triton X-114 for the removal of crystal violet using CPE.
Highlights
Removal of dyes from wastewater is one of the most significant problems faced by the dyestuff manufacturing, textile dyeing, and printing industries[1]
The results show that Tergitol NP-7 gives a better distribution coefficient than Triton X-114 for the extraction of crystal violet
The phase volume ratio was found to increase with surfactant concentration, whereas it decreased with operating temperature
Summary
Removal of dyes from wastewater is one of the most significant problems faced by the dyestuff manufacturing, textile dyeing, and printing industries[1]. An attempt was made to compare the performance of two different non-ionic surfactants, Tergitol NP-7 and Triton X-114, to remove crystal violet from a synthetic dye solution by the cloud-point extraction process. The effects of temperature, surfactant concentration, and dye concentration on various parameters like phase volume ratio, preconcentration factor, distribution coefficient, and extraction efficiency were studied.
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