DEGRADATION BEHAVIOR AND BIOLOGICAL RESPONSE OF CIPROFLOXACIN WASTEWATER BY INTIMATELY COUPLED PHOTOCATALYSIS AND BIODEGRADATION

ZHANG Zhibo; DONG Yilin; LI Jingchao; CHEN Xinyu; REN Zhijun

doi:10.13205/j.hjgc.202304003

Volume 41 Issue 4

Apr. 2023

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2023 > 41(4): 18-25

ZHANG Zhibo, DONG Yilin, LI Jingchao, CHEN Xinyu, REN Zhijun. DEGRADATION BEHAVIOR AND BIOLOGICAL RESPONSE OF CIPROFLOXACIN WASTEWATER BY INTIMATELY COUPLED PHOTOCATALYSIS AND BIODEGRADATION[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(4): 18-25. doi: 10.13205/j.hjgc.202304003

Citation:

ZHANG Zhibo, DONG Yilin, LI Jingchao, CHEN Xinyu, REN Zhijun. DEGRADATION BEHAVIOR AND BIOLOGICAL RESPONSE OF CIPROFLOXACIN WASTEWATER BY INTIMATELY COUPLED PHOTOCATALYSIS AND BIODEGRADATION[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(4): 18-25. doi: 10.13205/j.hjgc.202304003

Citation:

ZHANG Zhibo, DONG Yilin, LI Jingchao, CHEN Xinyu, REN Zhijun. DEGRADATION BEHAVIOR AND BIOLOGICAL RESPONSE OF CIPROFLOXACIN WASTEWATER BY INTIMATELY COUPLED PHOTOCATALYSIS AND BIODEGRADATION[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(4): 18-25. doi: 10.13205/j.hjgc.202304003

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DEGRADATION BEHAVIOR AND BIOLOGICAL RESPONSE OF CIPROFLOXACIN WASTEWATER BY INTIMATELY COUPLED PHOTOCATALYSIS AND BIODEGRADATION

doi: 10.13205/j.hjgc.202304003

School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China

Received Date: 2022-05-01
Available Online: 2023-05-26
Publish Date: 2023-04-01

Abstract

Abstract

The degradation behavior of ciprofloxacin (CIP) by intimately coupled photocatalysis and biodegradation system (ICPB) was investigated in this study. The effects of different reaction conditions on the degradation efficiency of CIP by ICPB system and the response and key role of organisms in ICPB were discussed. The results showed that the best CIP removal effect was achieved in the ICPB reaction system with a carrier dosage of 30%, a light intensity of 50 klux, an initial pH of 7 and a dissolved oxygen concentration of 5 to 6 mg/L, and a high removal efficiency could be kept in a wide range of initial CIP concentrations (5 to 30 mg/L), and the degradation efficiency (90%) was significantly better than that of photocatalysis alone (80%) and biodegradation alone (50%). The biofilm observation result clarified that biofilms inside the carriers of ICPB were not significantly damaged, and microorganisms survived by using the small molecule intermediates formed by the photocatalytic oxidation of CIP and, further biodegraded these products to achieve complete mineralization. The biofilms in ICPB adapt to environmental stress through the enrichment of Ferruginibacter, Clostridium, Stenotrophomonas and Comamonas, and the succession of the community structure was of great importance for the survival of microorganisms.
- intimately coupled photocatalysis and biodegradation,
- ciprofloxacin wastewater,
- degradation behavior,
- degradation pathway,
- biological response

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References(28)

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