Photocatalytic degradation of azo dye using nano-ZrO2/UV/Persulfate: Response surface modeling and optimization
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- 作者：Mahsa Moradi ; Farshid Ghanbari…
- 关键词：Nano ; ZrO2 ; Synthetic Dye ; Sulfate Radical ; Response Surface Method
- 刊名：Korean Journal of Chemical Engineering
- 出版年：2016
- 出版时间：February 2016
- 年：2016
- 卷：33
- 期：2
- 页码：539-546
- 全文大小：1,042 KB
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Farshid Ghanbari (3)
Mohammad Manshouri (4)
Kambiz Ahmadi Angali (5)
1. Department of Environmental Health Engineering, School of Paramedicine and Public Health, Semnan University of Medical Sciences, Semnan, Iran
2. Department of Environmental Health Engineering, School of Medical Sciences, Tarbiat Modares University, Tehran, Iran
3. Department of Environmental Health Engineering, School of Public Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
4. Department of Environmental Health Engineering, School of Public Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran
5. Department of Statistics and Epidemiology, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran - 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Industrial Chemistry and Chemical Engineering
Catalysis
Materials Science
Biotechnology - 出版者：Springer New York
- ISSN：1975-7220
文摘
Dyes have always been considered in the context of recalcitrant organic pollutants in water. The present research has focused on the decolorization of Direct Blue 71 (DB71) using photocatalysis process of nano-ZrO2/UV/ Persulfate. Response surface method with central composite design was applied to determine the effects of four main factors (time, ZrO2 dosage, persulfate dosage and pH) on decolorization of DB71. The results indicated that the obtained quadratic model had a high R-squared coefficient based on the analysis of variance (ANOVA). Time had the highest effect (45.5%) on decolorization of DB71. The optimum condition predicted for complete decolorization was pH=7, 0.4 g ZrO2, 0.75 mM persulfate and 40 min reaction time. Verification experiments confirmed that there was good agreement between the experimental and predicted responses. The studied photocatalytic process could oxidize and destruct the structure of the DB71, and average oxidation state (AOS) significantly increased from −1.5 to +1.33, indicating the presence of more oxidized by-products and, consequently, improvement of biodegradability. The quenching tests showed that sulfate radical was the major agent in DB71 decolorization. It can be concluded that nano-ZrO2/ UV/Persulfate is a very effective process for decolorization of colored wastewater. Keywords Nano-ZrO2 Synthetic Dye Sulfate Radical Response Surface Method