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Removal of Residual Antibiotics-Ciprofloxacin, Trimethoprim and Enrofloxacin-from Water by Ozone Oxidation

수중 미량 잔류항생물질 Ciprofloxacin, Trimethoprim, Enrofloxacin의 오존산화제거

  • Han, Min-Su (Department of Environmental Engineering, Chung Nam National University) ;
  • Choi, Yeon-Woo (Department of Environmental Engineering, Chung Nam National University) ;
  • Song, Jun-Hyuck (Department of Environmental Engineering, Chung Nam National University) ;
  • Wang, Chang-Keun (Department of Environmental Engineering, Chung Nam National University)
  • 한민수 (충남대학교 환경공학과) ;
  • 최연우 (충남대학교 환경공학과) ;
  • 송준혁 (충남대학교 환경공학과) ;
  • 왕창근 (충남대학교 환경공학과)
  • Received : 2017.10.16
  • Accepted : 2018.01.30
  • Published : 2018.03.30

Abstract

Oxidation of Ciprofloxacin, Trimethoprim, and Enrofloxacin by ozone was experimentally investigated to observe the effects of background water quality (such as ultrapure water, humic acid, and biologically treated wastewater) and water temperature on the removal rate of these antibiotics, and, thereby, to be able to provide design information when the ozone treatment process is adopted. Initial concentrations of the antibiotics spiked to $10{\mu}g/L$, and the ozone dose was 1, 2, 3, 5, and 8 mg/L. While the removal rate of Ciprofloxacin under ultrapure water background by ozone oxidation was over 99%, the removal rate under humic acid and biologically treated wastewater background was markedly lower, in the range of 49.3% ~ 99% and 19.8 % ~ 99 %, respectively. When water temperature is decreased from $20^{\circ}C$ to $4^{\circ}C$, the removal rate is reduced from the range of 19.8% ~ 99 % to the range of 7.5 % ~ 99 % under a biologically treated wastewater background. The effects of background and temperature on the removal rate of Trimethoprim and Enrofloxacin were similar to that of Ciprofloxacin, but the degree was different. Therefore, it is concluded that the background of water to be treated, as well as water temperature, should be taken into consideration when the design factor, such as ozone dose, is determined, so that the treatment objective of the ozone treatment process can be most effectively met.

Keywords

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