M shahgholi
I. Shahgholi
M. H. Rasoulifard

Synthetic dyes are extensively used in many industries. About 15% of the total world production of dyes is lost during textile dyeing which is released in textile effluents. Treatment of colored wastewater from these industries is a serious problem that has attracted the attention of many researchers. Among all of the methods for the treatment of wastewater, "Advanced Oxidation Processes" (AOPs) are one of the newest methods have been developed to degrade biorefractory organics industrial effluents.. In this study, the use of nanotechnology as a new method for organic Direct blue 129 dyes removal in small amounts from aqueous solutions which is used in the dyeing of cellulosic fibers, cotton and wool and nylon fibers was studied through the advanced oxidation process in the presence of immobilized TiO2 nanopowder on glass beads under a set of effective parameters (initial concentration of S2O82 , Direct blue 129, Temperature and PH).Using oxidizer agent or nano TiO2 catalyst alone or UV irradiation lone too, did not lead to any removal, while the simultaneous use of Peroxydisulfate and nano TiO2 and UV irradiation significantly increased removal efficiency.Our results suggest that the oxidative treatment of Direct blue 129 by ammonium peroxydisulfate activated with Nano TiO2 and UV irradiation is a viable, fast, economic and environment friendly option for removal of the textile dyes from effluents.

Advanced Oxidation Process, Direct blue 129, Ammonium peroxydisulfate , Nano-Titanium dioxide, UV irradiation, Wastewater Treatment