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Paper Information

Journal:   ADVANCES IN ENVIRONMENTAL TECHNOLOGY   2015 , Volume 1 , Number 2; Page(s) 59 To 68.
 
Paper: 

OPTIMIZATION AND KINETIC EVALUATION OF ACID BLUE193 DEGRADATION BY UV/PEROXYDISULFATE OXIDATION USING RESPONSE SURFACE METHODOLOGY

 
 
Author(s):  AHMADI MOJTABA*, ARDAKANI MOHMMAD HAMED, ZINATIZADEH ALI AKBAR
 
* CHEMICAL ENGINEERING DEPARTMENT, FACULTY OF ENGINEERING, RAZI UNIVERSITY, KERMANSHAH, IRAN
 
Abstract: 

The optimization of process conditions for the degrada on of Acid Blue 193 by UV/peroxydisulfate was investigated using response surface methodology (RSM). The effects of four parameters namely initial K2S2O8 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 (R2) 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 K2S2O8 concentra on of 5 mM, UV irradia on of 250 W, temperature of 50oC, and the ini al dye concentra on 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--1, respectively.

 
Keyword(s): POTASSIUM PEROXYDISULFATE, BLUE DYE, RESPONSE SURFACE METHODOLOGY, COLOR REMOVAL, OPTIMIZATION
 
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