Investigation of the Toxicity Reduction in Reactive Dye Solution and Real Textile Wastewater by Nanophotocatalysis Process Using Daphnia Magna

In this research, the decolorization and toxicity reduction of colored solution (C.I. Reactive Orange 16, RO16) and real textile wastewater using nanophotocatalysis process were investigated. Effective decolorization parameters such as titania photocatalyst load, dye concentration, pH and inorganic salts were optimized. The toxicity reduction of wastewater was assessed by bioassay using Daphnia magna. At the beginning of the process, the toxicity of wastewater increased and its toxicity decreased at the end of the process. The results showed that the nanophotocatalysis process has the decolorization and toxicity reduction capabilities of real textile wastewater. J. Color Sci. Tech. 1(2008), 91-96. © Institute for Colorants, Paint and Coatings.