Bhaskar, S.Rashmishree, K.N.Manu, B.Sreenivasa, M.Y.2026-02-042022Water Science and Technology, 2022, 86, 8, pp. 2008-20192731223https://doi.org/10.2166/wst.2022.299https://idr.nitk.ac.in/handle/123456789/22359Biojarosite as a replacement for commercial iron catalyst in the oxidative degradation of the dye Rhodamine B was confirmed and established. Investigations on the oxidative degradation by Fenton’s oxidation and UV–Fenton’s oxidation with EDTA at neutral pH were conducted and degradation of target compound was evaluated. UV–Fenton’s oxidation was shown to be efficient over Fenton’s oxidation in the degradation of Rhodamine B with removal efficiency of 90.0%. Design of Experiments was performed with Box–Behnken design. Investigation was conducted for the predicted values separately for both Fenton’s oxidation and UV–Fenton’s oxidation and the Rhodamine B removal was taken as response. Variable parameters biojarosite, H<inf>2</inf>O<inf>2</inf> dosage and EDTA were optimized in the range of 0.1–1 g/L, 2.94–29.4 mM and 10–100 mM, respectively. A quadratic regression model is fitted for both Fenton’s and UV–Fenton’s oxidation. Analysis of variance (ANOVA) is performed and model fit is discussed. © 2022 The Authors.Analysis of variance (ANOVA)CatalystsDesign of experimentsIronOptimizationRegression analysisBiojarositeBox-BehnkenFenton’s processOxidative degradationProcess optimisationRhodamine-BS-processUv/fentonUV–fenton’s processOxidationedetic acidferrous gluconatehydrogen peroxideironrhodamine BdegradationEDTAexperimental designoptimizationsustainabilitysustainable developmentultraviolet radiationanalysis of varianceArticleBox Behnken designcomparative studycontrolled studydissolutionFenton reactioninterferometryoxidationprocess optimizationregression modelresponse surface methodtextile industryultraviolet spectrophotometrywaste component removalchemistryoxidation reduction reactionpHEdetic AcidHydrogen PeroxideHydrogen-Ion ConcentrationOxidation-Reduction