Iranian Research Organization for Science and TechnologyAdvances in Environmental Technology2476-66741219991130Optimization and kinetic evaluation of acid blue 193 degradation by UV/peroxydisulfate oxidation using response surface methodology596817910.22104/aet.1999.179ENMojtabaAhmadiRazi nuiversityM. HamedArdakanirazi universityA.AZinati Zadehrazi universityJournal Article19991130The optimization of process conditions for the degradation of Acid Blue 193 by UV/peroxydisulfate was investigated using response surface methodology (RSM). The effects of four parameters namely initial K<sub>2</sub>S<sub>2</sub>O<sub>8</sub> concentration, UV irradiation, temperature, and initial dye concentration on two process responses, color removal and the rate constants of the first-order kinetic equations, were investigated using a second-order polynomial multiple regression model. The analysis of variance (ANOVA) explained a high determination coefficient (R<sup>2</sup>) value of 0.927-0.967, which ensures a good fit of the first-order regression model with the experimental data. The central composite design (CCD) was used to optimize the process conditions, which showed that an initial K<sub>2</sub>S<sub>2</sub>O<sub>8 </sub>concentration of 5 mM, UV irradiation of 250 W, temperature of 50 °C, and the initial dye concentration of 40 mg/L were the best conditions. Under optimum conditions, the maximum color removal from the wastewater and the rate constants of the first-order kinetic equation were 100% and 0.086 min<sup>--1</sup>, respectively.https://aet.irost.ir/article_179_9c052385a3481f02f0c37bd464f9d852.pdf