optimization of the parameters influencing the photo-fenton process for the decolorization of reactive red 198 (rr198)

Background: reactive dyes, anionic compounds with high water solubility, are widely used in textile industries.objectives: the present study aimed to assess the feasibility of the photo-fenton process in removing reactive red 198 dye from aqueous solutions and determine the optimal conditions for maximum removal.materials and methods: this study was performed on a laboratory scale using a 4-liter photochemical reactor. the spectrophotometer dr5000 (wavelength 520 nm) was used to determine the dye concentration. the effect of the influencing parameters, including ph (3–9), fe (ii) concentration (10–200 mg/l), h2o2 concentration (25 - 150 mg/l), initial dye concentration (50–200 mg/l), and reaction time (15 - 120 minutes) were studied.results: according to the results, the photo-fenton (uv/ h2o2/fe (ii)) process significantly removed dye from the aqueous solution. the reactive red 198 dye removal efficiency from aqueous solutions was more than 99% at optimal conditions (ph = 3, fe (ii) = 10 mg/l, h2o2 = 75 mg/l, initial dye concentration = 50 mg/l, and reaction time = 120 minutes).conclusions: the present study demonstrated that the uv/ h2o2/fe (ii) process could be used as an efficient, reliable method for removing reactive red 198 dye from textile wastewater.