Inactivation of phage Qβ by 254nm UV light and titanium dioxide photocatalyst

被引：30

作者：

Lee, S

Nakamura, M

Ohgaki, S

机构：

[1] Ewha Womans Univ, Coll Engn, Dept Environm Sci & Engn, Seoul, South Korea

[2] Univ Tokyo, Dept Urban Engn, Bunkyo Ku, Tokyo 113, Japan

来源：

JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING | 1998年 / 33卷 / 08期

关键词：

Q beta; photocatalysis; TiO2; 254 nm UV; PCR; MPN;

D O I：

10.1080/10934529809376809

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 [工学]; 0830 [环境科学与工程];

摘要：

The disinfection efficacy of UV light irradiation at wavelength of 254 nm over a titanium dioxide (TiO2) suspension was compared to that of UV alone. Bacteriophage Q beta was used as a model virus for the study. Q beta in sterilized pure water and TiO2 suspension was irradiated by a 0.4 mW/cm(2) intensity of 254nm UV light. The UV light over TiO2 was more effective than 254nm UV alone in inactivating Q beta. 3.5-log(10) Q beta inactivation was achieved by UV irradiation over TiO2 suspension (10(3) mg/L) after 2 minutes of irradiation, while UV alone inactivated 2-log(10). Using a MPN-PCR method, a ca. 1-log(10)-unit decrease in Q beta RNA concentration was detected after 3 minutes of photocatalytic irradiation. The decrease was explained by damage to nucleic acid of phage Q beta due to radical oxidation, which is generated by photocatalysis.

引用

页码：1643 / 1655

页数：13

共 25 条

[1]

APHA, 1985, STAND METH EX WAT WA

[2]

Photocatalytic bactericidal activity of TiO2 in aqueous suspensions of E-coli [J].