Removal of Diclofenac, Ibuprofen and Naproxen using Oxidation Processes

산화공정에서의 Diclofenac, Ibuprofen 및 Naproxen의 제거특성 평가

  • 손희종 (부산광역시 상수도사업본부 수질연구소) ;
  • 유수전 (부산광역시 상수도사업본부 수질연구소) ;
  • 황영도 (부산광역시 상수도사업본부 수질연구소) ;
  • 노재순 (부산광역시 상수도사업본부 수질연구소) ;
  • 유평종 (부산광역시 상수도사업본부 수질연구소)
  • Received : 2009.06.25
  • Accepted : 2009.08.28
  • Published : 2009.10.31

Abstract

In order to evaluate a removal characteristic of diclofenac, ibuprofen and naproxen by oxidizing agents, $Cl_2,\;O_3$ and $O_3/H_2O_2$ are used as oxidants in this study. In case of that $Cl_2$ is used for oxidizing pharmaceuticals, ibuprofen is not removed entirely at $Cl_2$ dose range of 0.5~5.0 mg/L for 60 minutes, however, removal tendency of diclofenac and naproxen are so obviously at $Cl_2$ dose higher than 0.5 mg/L. In addition, as $Cl_2$ dose and contact time are increased, the removal rate of diclofenac and naproxen is enhanced. When $O_3$ is used as oxidizing agent, ibuprofen is not eliminated at $O_3$ dose range of 0.2~5.0 mg/L. On the contrary, 72~100% of diclofenac and 49~100% of naproxen are removed at $O_3$ dose of 0.2~5.0 mg/L. From experiments using $O_3/H_2O_2$ as an oxidant, we can find that $O_3/H_2O_2$ is much more effective than $O_3$ only for removal of diclofenac and naproxen. Moreover, the efficiency is raised according to increase of $H_2O_2$ dose, however, experiments using $O_3/H_2O_2$ show that oxidation of pharmaceuticals is less effective as $H_2O_2$ to $O_3$ ratio increased to above approximately 1.0. On reaction rate constant and half-life of diclofenac, ibuprofen and naproxen depending on $Cl_2$, $O_3$ and $O_3/H_2O_2$ dose, an oxidation of pharmaceuticals by $Cl_2$ and $O_3$ particularly has a comparatively high reaction rate constant and short half-life comparing $O_3/H_2O_2$. From above results, we can fine that diclofenac and naproxen can be easily eliminated in oxidation processes.

본 연구에서는 염소, 오존 및 오존/과산화수소 산화공정에서의 의약물질 3종의 제거특성을 살펴본 결과 diclofenac과 naproxen은 쉽게 산화공정에서 제거가 가능한 것으로 나타난 반면 ibuprofen의 경우는 산화공정에서 제거가 어려운 것으로 나타났다. 오존 단독공정 보다는 오존/과산화수소 산화공정에서의 의약물질의 제거효율이 높았으며, $H_2O_2/O_3$ 비가 1 이상에서는 제거율의 상승이 둔화되었다. 염소, 오존 및 오존/과산화수소 투입농도별 의약물질 3종에 대한 산화분해 속도 상수와 반감기를 살펴본 결과 염소, 오존 단독 투입에 비하여 오존/과산화수소 공정에서의 산화분해 속도상수가 높게 나타났고, 반감기는 단축되었다.

Keywords

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