Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Disinfection of E.coli in Drinking Water by TiO2 Photocatalytic System

TiO2 광촉매 시스템을 이용한 음용수 중의 대장균 살균연구

  • Jung, Jin-Ah (School of Chemical Engineering.Solar Energy Research Center, Chonbuk National University) ;
  • Kwak, Do Hwan (School of Chemical Engineering.Solar Energy Research Center, Chonbuk National University) ;
  • Oh, Dae Woong (School of Chemical Engineering.Solar Energy Research Center, Chonbuk National University) ;
  • Park, Dong Min (School of Chemical Engineering.Solar Energy Research Center, Chonbuk National University) ;
  • Yang, O-Bong (School of Chemical Engineering.Solar Energy Research Center, Chonbuk National University)
  • 정진아 (전북대학교 화학공학부.태양에너지연구센터) ;
  • 곽도환 (전북대학교 화학공학부.태양에너지연구센터) ;
  • 오대웅 (전북대학교 화학공학부.태양에너지연구센터) ;
  • 박동민 (전북대학교 화학공학부.태양에너지연구센터) ;
  • 양오봉 (전북대학교 화학공학부.태양에너지연구센터)
  • Received : 2011.05.02
  • Accepted : 2011.07.07
  • Published : 2012.02.01
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Abstract

Disinfection of Escherichia coli (E. coli) in drinking water was investigated by using $TiO_2$ and $TiO_2-SiO_2$ based photocatalyst prepared by sol-gel method. The disinfection test was carried out in an annular flow reactor with circulating sterile water containing the photocatalysts powder under UV-A irradiation. The disinfection activity was proportional to the anatase`s intensity of crystalline peak of the $TiO_2$ photocatalysts. 100% disinfection of E.coli without endotoxin was achieved with $TiO_2$ coated photocatalytic system under UV-A irradiation within 2 h. However, toxic endotoxine was exist in the disinfection of E.colithe under UV-C irradiation even though 100% disinfection of E.colithe within 30 min, which suggest that $TiO_2$ coated photocatalytic system with UV-A is useful tool for the disinfection of E.coli in drinking water.

졸-겔 방법에 의하여 제조된 $TiO_2$와 $TiO_2-SiO_2$ 광촉매를 이용한 음용수 중의 대장균 살균과 엔도톡신 제거에 관한 연구를 수행하였다. 대장균 살균실험은 대장균이 포함된 물이 순환되는 annular-흐름식 광촉매 코팅 반응기에서 수행되었다. 대장균의 살균능은 $TiO_2$와 $TiO_2-SiO_2$ 광촉매의 아나타제 결정성피크의 세기와 비례하였다. UV-A 조사하에 $TiO_2$가 코팅된 반응기에서 2시간 내에 대장균을 100% 살균시킬 수 있었으며, 대장균 사멸시 생성되는 독성물질인 엔도톡신이 존재하지 않았다. 그러나 UV-C 조사하에서는 30분 이내에 대장균을 100% 살균할 수 있었으나 엔도톡신이 완전히 제게되지 않았다. 따라서 광촉매와 UV-A 조사가 음용수 살균에 유용함을 알 수 있었다.

Keywords

Acknowledgement

Grant : 실리콘계 태양전지 소재.소자 고급트랙

Supported by : 한국에너지기술평가원

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