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Comparative study of energy consumption, kinetic, and performance between conventional and baffled photocatalytic reactor (BPCR) to ofloxacin photo-degradation

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Abstract

Regarding the cost-effective photo-degradation of ofloxacin (OFL), present study investigates UV/sulfite /ZnO (USZ) in reactor conventional (without baffles) and baffled photocatalytic reactor (BPCR). The optimal condition was 0.77:2:50 sulfite/ZnO/OFL molar ratio, pH 7, and 30 min reaction time for 100% degradation of 200 mg L−1 concentration of OFL. As information obtained, the UZI process reduces the BOD and COD level about 66% to 86.29% within 80 min reaction, respectively. Also, BOD/COD ratio initial from 0.26 reaches 0.6 after 30 min of reaction time. Kinetic investigation increasing OFL concentration, kobs and robs increase, and, secondly, in the conventional and BPCR reactor, kobs increase is about 17% and 50% with increasing OFL concentration from 50 to 200 mgL−1. Also, figure-of-merit EEo varies from 12.66 to 17.41 and 7.26 to 10.15 kWhm3 for conventional reactor and 8.66–13.61 to 5.24–8.12 kWhm3, respectively. Also, kinetic model EEo declines from 15.23 to 8.61 and from 13.31 to 5.37 kWh m−3 in conventional and BPCR, respectively. Total cost of the system (TCS) decreases from 7.31 to 2.16 $ in conventional reactor and 4.57 to 0.55 $ in PCBR reactor. Total cost of the system (TCS) was investigated at different concentrations.

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Acknowledgements

The authors would like to thank all the staff of the laboratory of the Department of Environmental Health Engineering in Shahid Beheshti University of Medical Sciences for their kind cooperation.

Funding

This study is related to the project NO.99/63706 from Student Research Committee, Shahid Beheshti University of Medical Sciences, Tehran, Iran. We also appreciate the “Student Research Committee” and “Research & Technology Chancellor” in Shahid Beheshti University of Medical Sciences for their financial support of this study.

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Authors

Contributions

Mohsen Sadani: conceptualization, software, and methodology. Pouria karimi: writing original draft and data curation. Hossein Azarpira: writing - review and editing, conceptualization, and methodology. Tayebeh Rasolevandi: analysis, visualization, and investigation. Mansour Sarafraz: validation and software. All authors contributed in writing, reading, and approving the final manuscript.

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Correspondence to Mohsen Sadani.

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This manuscript is confirmed by ethical committee of Shahid Beheshti University of Medical Sciences (IR.SBMU.RETECH.REC.1399.1172).

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The authors declare no competing interests.

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Responsible Editor: Sami Rtimi

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Karimi, P., Sadani, M., Azarpira, H. et al. Comparative study of energy consumption, kinetic, and performance between conventional and baffled photocatalytic reactor (BPCR) to ofloxacin photo-degradation. Environ Sci Pollut Res 29, 64914–64923 (2022). https://doi.org/10.1007/s11356-022-20066-8

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