Liquid-Liquid Extraction of Basic Yellow 28, Basic Blue 41, and Basic Red 46 Dyes from Aqueous Solutions with Reverse Micelles

The removal of 2-[[(4-methoxyphenyl)methylhydrazono]methyl]-1,3,3-trimethyl-3H-indolium methyl sulfate (Basic Yellow 28), 2-[N-ethyl-4-[(6-methoxy-3-methyl-1,3-benzothiazol-3-ium-2-yl)diazenyl]anilino]ethanol methyl sulfate (Basic Blue 41), and N-benzy14-[(1,4-dimethy1-1,5-dihydro-1,2,4-triazol-1-ium-5-yl)diazenyl]-N-methylaniline bromide (Basic Red 46) cationic textile dyes from model wastewater by liquid liquid extraction with reverse micelles was performed with isopentanol as a solvent and sodium dodecylsulfate as an anionic surfactant. The dye concentration in both aqueous and organic phase was determined by visible spectrophotometry analysis. The influence of dye and surfactant initial concentrations on the solute partition coefficient and percentage of removal were studied. The partition coefficient and percentage of removal increase with the decrease in initial dye concentration and with the increase in surfactant concentration.