polyaniline/ waste of tea factories composite as a absorbent for the removal of acid blue 9 from industrial waste water

Abstract In this study, polyaniline/ waste of tea factories composite was synthesized, and were used to remove acid blue 9 dyes from the environment. The resulting materials were characterized by FTIR, and FESEM analysis. The effects of different parameters including pH, contact time, initial concentration and adsorbent mass were also investigated.The optimum acid blue 9 removal efficiency on polyaniline/ waste of tea factories composite is achieved under experimental conditions of pH =2, contact time of 120 minutes, initial dye concentration of 40 ppm, and adsorbent mass of 0.1 g. The experimental data were adjusted with Langmuir model. The results show that the kinetic pseudo-second-order model fits the data.Thermodynamic parameters such as ΔG°, ΔH°, and ΔS° were also measured; the obtained values showed that the adsorption was basically spontaneous and endothermic. According to the results, a simple, economical, and efficient method was presented to remove biodegradation-resistant pollutants using polyaniline/waste of tea factories composite.