Optimization of Photooxidative Removal of Phenazopyridine from Water
- Authors: Saeid S.1,2, Behnajady M.A.1, Tolvanen P.2, Salmi T.2
-
Affiliations:
- Department of Chemistry, Tabriz Branch
- Laboratory of Industrial Chemistry and Reaction Engineering, Johan Gadolin Process Chemistry Centre
- Issue: Vol 92, No 5 (2018)
- Pages: 876-883
- Section: Chemical Kinetics and Catalysis
- URL: https://journals.rcsi.science/0036-0244/article/view/169991
- DOI: https://doi.org/10.1134/S0036024418050266
- ID: 169991
Cite item
Abstract
The photooxidative removal of analgesic pharmaceutical compound phenazopyridine (PhP) from aqueous solutions by UV/H2O2 system with a re-circulated photoreactor was investigated. Response surface methodology (RSM) was employed to optimize the effect of operational parameters on the photooxidative removal efficiency. The investigated variables were: the initial PhP and H2O2 concentrations, irradiation time, volume of solution and pH. The analysis of variance (ANOVA) of quadratic model demonstrated that the described model was highly significant. The predicted values of the photooxidative removal efficiency were found to be in a fair agreement with experimental values (R2 = 0.9832, adjusted R2 = 0.9716). The model predicted that the optimal reaction conditions for a maximum removal of PhP (>98%) were: initial PhP concentration less than 23 mg L–1, initial concentration of H2O2 higher than 470 mg L–1, solution volume less than 500 mL, pH close to 2 and irradiation time longer than 6 min.
About the authors
Soudabeh Saeid
Department of Chemistry, Tabriz Branch; Laboratory of Industrial Chemistry and Reaction Engineering, Johan Gadolin Process Chemistry Centre
Email: behnajady@iaut.ac.ir
Iran, Islamic Republic of, Tabriz; Abo/Turku
Mohammad A. Behnajady
Department of Chemistry, Tabriz Branch
Author for correspondence.
Email: behnajady@iaut.ac.ir
Iran, Islamic Republic of, Tabriz
Pasi Tolvanen
Laboratory of Industrial Chemistry and Reaction Engineering, Johan Gadolin Process Chemistry Centre
Email: behnajady@iaut.ac.ir
Finland, Abo/Turku
Tapio Salmi
Laboratory of Industrial Chemistry and Reaction Engineering, Johan Gadolin Process Chemistry Centre
Email: behnajady@iaut.ac.ir
Finland, Abo/Turku