Optimization and Removal Efficiency of Basic Textile Dyestuffs with Using Perfluorosulfonic Acid-Based Polymer

The removal of basic dyestuffs (Basic Red 46 and Basic Blue 41) from synthetic dye solutions was examined by using perfluorosulfonic acid-based polymer for the first time in the present study. The effects of four different variables, such as pHs (3.0, 5.0, 7.0, 9.0, and 11.0), temperature (25 °C, 35 °C, 45 °C, 55 °C, and 65 °C), initial dyestuffs concentration (20, 40, 60, 80 and 100 mg L-1) and treatment time (20, 40, 60, 80 and 100 min.) on the removal performance were investigated. The optimum conditions were determined for R46 as pH: 6.5; temperature: 54.1 °C; concentration: 97.4 mg L-1; time: 60.8 min. and for B41 as pH: 7.5; temperature: 54.6 °C; concentration: 67.1 mg L-1; time: 69.5 min. by using Response Surface Methodology. Removal performance values for R46 and B41 were determined respectively 99.9% and 99.5% at the optimum conditions. Also, perfluorosulfonic acid-based polymer was able to regenerate up to 20 cycles without significant performance change for the dyestuff removal process.