Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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Catalytic Ozonation of Phenol

페놀의 촉매오존산화 반응에 관한 연구

  • Lee, Cheal-Gyu (Department of Environmental Engineering, Chongju University) ;
  • Woo, Jeong-Hun (Department of Environmental Engineering, Chongju University)
  • Received : 2011.08.23
  • Accepted : 2011.10.26
  • Published : 2011.10.31
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Abstract

In this study AOPs of $O_3/UV$ radiation, $O_3/Mg(OH)_2/UV$ radiation and $O_3/MgO/UV$ radiation system for phenol treatment in aqueous solution was performed in a laboratory scale circulating batch reacter. Flow rate of ozone 1.0 L/min, ozone concentrations $150{\pm}10mg/L$ was maintained constantly at the above-mentioned oxidation processes. During the oxidation processes the $COD_{Cr}$ and TOC was measured in the composition. The pseudo first-order rate constants of the processes was $5.12{\times}10^{-5}$, $1.19{\times}10^{-4}$ and $1.79{\times}10^{-4}sec^{-1}$, and the activation energy was 3.03, 1.79 and $2.32kcal{\cdot}mol^{-1}$ at $20^{\circ}C$, respectively. It was found that both $Mg(OH)_2$ and MgO had remarkable accelerations on degradation of phenol and removal of COD in water. On this basis, $O_3/MgO/UV$ system is an effective and feasible routes for catalytic ozonation of phenol in water.

본 논문에서는 실험실적 규모의 순환형 회분식 반응기에서 수용액상 phenol을 처리하기 위해 $O_3/UV$ radiation, $O_3/Mg(OH)_2/UV$ radiation 그리고 $O_3/MgO/UV$ radiation 고급산화공정(AOPs)에 대한 연구를 수행하였다. 오존의 유량은 1.0 L/min, 오존 농도를 $150{\pm}10mg/L$로 일정하게 유지 하였으며, 산화반응에 나타나는 $COD_{Cr}$ 및 TOC를 각각 측정하였다. $20^{\circ}C$에서 $O_3/UV$ radiation, $O_3/Mg(OH)_2/UV$ radiation 그리고 $O_3/MgO/UV$ radiation에 대한 유사 1차 반응속도 상수는 각각 $9.31{\times}10^{-5}sec^{-1}$, $1.19{\times}10^{-4}sec^{-1}$ 그리고 $1.79{\times}10^{-4}sec^{-1}$, 활성화 에너지는 각각 $3.03kcal{\cdot}mol^{-1}$, $1.79kcal{\cdot}mol^{-1}$ 그리고 $4.23kcal{\cdot}mol^{-1}$ 로 나타났다. 수용액상에서 $Mg(OH)_2$와 MgO가 phenol의 분해와 COD의 제거에 현저한 촉진작용을 나타낸다는 것을 확인하였다. 이러한 실험 결과에 기초하여 $O_3/MgO/UV$ 시스템이 수용액상 phenol을 처리하기 위한 효율적이고 용이한 방법임을 제시하였다.

Keywords

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