Abstract:

In order to develop the new technology for the treatment of dyeing wastewater, the anionic water soluble reactive dyes were removed and reused by the extraction method using reverse micelles in this study. The effect of concentration and structure of dyes on the dye removal were investigated, and the ionic exchange models were employed to fit the experimental data. Then the affecting factor such as pH values and salt concentration were also studied. Finally, the recovered dyes were reused for the dyeing cotton fabrics. The results showed that the reactive dyes could be removed by the extraction methods. The removal process of dyes indicated the better agreement with the ionic exchange models equations. The increased salt concentration caused the improvement of dye removal. And the pH values exhibited reverse trend. The good dyeing property was obtained for the reused dyes.

Key words: reverse micelle, extraction, reactive dye, dyeing wastewater, reuse