Korean Chemical Engineering Research, Vol.50, No.1, 11-17, February, 2012
TiO2 광촉매 시스템을 이용한 음용수 중의 대장균 살균연구
Disinfection of E.coli in Drinking Water by TiO2 Photocatalytic System
E-mail:
초록
졸-겔 방법에 의하여 제조된 TiO2와 TiO2-SiO2 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 TiO2와 TiO2-SiO2 광촉매의 아나타제 결정성피크의 세기와 비례하였다. UV-A 조사하에 TiO2가 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.
Disinfection of Escherichia coli (E. coli) in drinking water was investigated by using TiO2 and TiO2-SiO2 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 TiO2 photocatalysts. 100% disinfection of E.coli without endotoxin was achieved with TiO2 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 TiO2 coated photocatalytic system with UV-A is useful tool for the disinfection of E.coli in drinking water.
Keywords:Disinfection of E.coli;TiO2 Photocatalyst;Toxic Endotoxine;TiO2-SiO2 Photocatalyst;Drinking Water
- Shiraishi F, Toyoda K, Fukinbara S, Obuchi E, Nakano K, Chem. Eng. Sci., 54(10), 1547 (1999)
- Hassen A, Mahrouk M, Ouzari H, Cherif M, Boudabous A, Damelincourt JJ, Bioresour. Technol., 74(2), 141 (2000)
- Driedger A, Staub E, Wat. Res., 35, 2950 (2001)
- Sokmen M, Candan F, J. Photochem. Photobiol., 143, 241 (2001)
- Butterfield IM, Christensen PA, Wat. Res., 31, 675 (1997)
- Kikuchi Y, Sunada K, J. Photochem. Photobiol., A: Chemistry., 106, 51 (1997)
- Kim JK, Shin YG, Kim SW, The Korean Journal of Microbilogy., 37, 130 (2001)
- Huang N, Xiao Z, Supramolecular Science., 5, 559 (1998)
- Belhacova L, Krysa J, Geryk J, Jirkovsky J, J. Chem. Technol. Biotechnol., 74(2), 149 (1999)
- Ollis DF, Chemistry., 3, 405 (2000)
- Sunada K, Kikuchi Y, Environmental Science & Technology., 32, 726 (1998)
- Zhao G, Kozuka H, Yoko T, Thin Solid Films, 277(1-2), 147 (1996)
- Vamathevan V, Tse H, Amal R, Low G, McEvoy S, Catal. Today, 68(1-3), 201 (2001)
- Gesenhues U, J. Photochem. Photobiol. A: Chemistry., 139, 243 (2001)
- Yoon JW, Scripta mater., 4, 1865 (2001)
- Ranjit KT, J. photochem. photobiol.A:Chemistry., 108, 79 (1997)
- Dutoit DC, Schneider M, Hutter R, Baiker A, J. Catal., 161(2), 651 (1996)
- Kriventsov VV, Nuclear Instruments and Methods in Physics Research A., 470, 347 (2001)
- Gallardo J, Duran A, J. Non-Crystalline Solids., 298, 219 (2002)
- Dutoit DC, Schneider M, Baiker A, J. Catal., 153(1), 165 (1995)
- Dutoit DC, Gobel U, Schneider M, Baiker A, J. Catal., 164(2), 433 (1996)
- Herrmann JM, Tahiri H, Aitichou Y, Lassaletta G, Gonzalezelipe AR, Fernandez A, Appl. Catal. B: Environ., 13(3-4), 219 (1997)
- Fallet M, Mahdjoub H, J. Non-Crystalline Solid., 293, 527 (2001)
- Park SS, Koo YM, HWAHAK KONGHAK, 33(3), 386 (1995)
- Kim KW, Kim YJ, Lee MH, Korean Chem. Eng. Res.(HWAHAK KONGHAK)., 42(6), 2 (2004)
- Park S, Joo H, Kim Y, Jeon M, HWAHAK KONGHAK, 41(4), 542 (2003)
- Park SS, Park JH, Kim SJ, Jung SC, Korean Chem. Eng. Res., 46(6), 1063 (2008)
- Kim KW, Lee EH, Kim YJ, Lee MH, Kim KH, Shin DW, HWAHAK KONGHAK, 41(2), 152 (2003)
- Kwon TO, Park BB, Moon IS, Korean Chem. Eng. Res., 45(6), 648 (2007)
- Jung SC, Kim SC, Seo SG, HWAHAK KONGHAK, 39(4), 385 (2001)
- Park DR, Ahn BJ, Park HS, Yamashita H, Anpo M, Korean J. Chem. Eng., 18(6), 930 (2001)
- Yoa SJ, Cho YS, Kim JH, Korean J. Chem. Eng., 22(3), 364 (2005)
- Lee E, Lee H, Jung W, Park S, Yang D, Lee K, Korean J. Chem. Eng., 26(5), 1301 (2009)
- Lee SM, Chang WJ, Choi AR, Koo YM, Korean J. Chem. Eng., 22(5), 687 (2005)