Removal of Benzene and Toluene by Photo-catalyst Adsorbent Prepared from MSWI Fly Ash

소각비산재로 제조한 광촉매 흡착제의 벤젠과 톨루엔 제거특성

  • Choi So-Young (Department of Environmental Engineering, Graduate School Kangwon National Univesity) ;
  • Shim Young-Sook (Department of Environmental Engineering, Graduate School Kangwon National Univesity) ;
  • Lee Woo-Keun (Department of Environmental Engineering, Graduate School Kangwon National Univesity)
  • 최소영 (강원대학교 환경공학과) ;
  • 심영숙 (강원대학교 환경공학과) ;
  • 이우근 (강원대학교 환경공학과)
  • Published : 2005.08.01

Abstract

In order to apply the photocatalytic decomposition of aromatic VOCs, adsorbent prepared from MSWI fly ash was coated by $TiO_2$ solution to endow with photo-catalytic function. The effects of coating number, existence of light source and the type of $TiO_2$ solution used for coating were examined. Adsorbent coated with amorphous $TiO_2$ solution showed higher adsorptivity than adsorbent coated with crystal $TiO_2$ solution. Without light source, breakthrough curve of photo -catalyst absorbent for VOCs removal was similar to that of absorbent made from MSWI fly ash. On the other hand, breakthrough time was enlarged with light source and total removal efficiency of benzene and toluene was also increased. It can be explained as photo-decomposition effect of $TiO_2$ photo-catalyst. Total removal efficiency of benzene and toluene was increased according to the increase of coating number with light source. It was due to the effect of adsorption and photo reaction of photo-catalytic adsorbent. But total removal efficiency of benzene was lower than that of toluene. Because benzene was removed more effectively than toluene by adsorption, but photo - decomposition effect oi toluene was more high than benzene.

Keywords

Fly ash;Adsorption;Volatile organic compound

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