Refractory petrochemical wastewater treatment by K2S2O8 assisted photocatalysis
| Autor: | Yao Yongge, Zhao Di, Song Leshan, Haiyan Yan, Qianfeng He, Cai Qunhuan, Shihui Si |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
02 engineering and technology Mineralization (soil science) 010501 environmental sciences 021001 nanoscience & nanotechnology 01 natural sciences Catalysis Reaction rate constant lcsh:Biology (General) Photocatalysis Aeration 0210 nano-technology General Agricultural and Biological Sciences Photocatalytic degradation Petrochemical wastewater Zeolite lcsh:QH301-705.5 0105 earth and related environmental sciences Nuclear chemistry |
| Zdroj: | Saudi Journal of Biological Sciences, Vol 26, Iss 4, Pp 849-853 (2019) |
| Popis: | The K2S2O8 assisted photocatalytic system was applied for treating refractory petrochemical wastewater. Co-TiO2/zeolite catalyst synthesized by sol-gel method was demonstrated to possess a good activity towards mineralization of the refractory petrochemical wastewater in the K2S2O8 assisted photocatalytic system. Orthogonal design was employed to optimize the reaction parameters, according to the results, K2S2O8 dosage was the most prominent impact factor. More experiments were conducted to further enhance the COD removal efficiency. In consideration of both efficiency and costs, the petrochemical wastewater was treated in the K2S2O8 assisted photocatalytic system at pH 4, K2S2O8 dosage 2.03 g/L, catalyst amount 250 g/L with irradiation by 1 lamp and aeration. The COD removal efficiency reached up to 93.4% with a rate constant of 1.14 × 10−2 per min, and Co-TiO2/zeolite showed a good stability towards the K2S2O8 assisted photocatalytic degradation of petrochemical wastewater. Keywords: Refractory petrochemical wastewater, K2S2O8 assisted photocatalysis, Co-TiO2/zeolite, Sulfate radical |
| Databáze: | OpenAIRE |
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