Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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A Study on the Removal Characteristics of Phenol Using Waste CDQ Dust as Adsorbent

폐CDQ 분진을 흡착제로 한 페놀제거특성에 관한 연구

  • Kim, Jin-Wha (Department of Environmental Science and Engineering, Ewha Womans University) ;
  • Lee, Jung-Min (Department of Environmental Science and Engineering, Ewha Womans University) ;
  • Kim, Dong-Su (Department of Environmental Science and Engineering, Ewha Womans University)
  • 김진화 (이화여자대학교 공과대학 환경공학과) ;
  • 이정민 (이화여자대학교 공과대학 환경공학과) ;
  • 김동수 (이화여자대학교 공과대학 환경공학과)
  • Received : 1999.12.27
  • Accepted : 2000.04.06
  • Published : 2000.07.31
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Abstract

The adsorption characteristics of phenol has been studied by using CDQ (Cokes Drying Quenching) dust as an adsorbent. The adsorption capacity of CDQ dust was shown to be 42% about removal for 300 ppm phenol solution at the equilibrium adsorption time of 60 min. Removal percentage of phenol increased as the initial phenol concentration was raised in the experimental conditions and the adsorption behavior was explained well by Freundlich adsorption isotherm. Kinetic study showed that the adsorption followed 1st, 1.5th, and 2nd-order rate equation in the sequence as the adsorption time passed. Since the adsorption amount of phenol was increased as the adsorption temperature was raised, the adsorption was thought to be endothermic, and several thermodynamic parameters have been calculated based upon experimental data. Adsorbed amount of phenol on CDQ dust changed little according to the variation in the solution pH except for the slight decrease under the strong alkaline condition.

CDQ 분진을 흡착제로 사용하여 페놀의 흡착제거 양상을 검토하였다. CDQ 분진의 흡착능은 300 ppm의 페놀 용액에 대해 흡착평형시간 60분에서 약 42%의 흡착율을 보이는 것으로 나타났다. 페놀의 초기농도를 달리하여 흡착실험한 결과, 실험조건범위에서 농도가 증가함에 따라 흡착제거율이 증가하였으며 흡착양상은 Freundlich 등온흡착식에 잘 적용되었다. 흡착의 속도론적 해석시, 시간에 따른 속도식의 차수는 1차, 1.5차, 그리고 2차로 변화하는 것으로 파악되었다. 온도에 따른 흡착에서는 온도가 상승함에 따라 흡착제거량이 증가하여 흡열임을 보였으며, 이의 결과를 바탕으로 흡착에 대한 열역학적 데이터를 도출하였다. pH변화에 따른 페놀의 흡착량은 거의 변화가 없는 것으로 관찰되었으나, pH 11 이상의 영역에서는 다소 감소하는 것으로 나타났다.

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