Photocatalytic inactivation of Cryptosporidium parvum with TiO2 and low-pressure ultraviolet irradiation

被引：44
|
作者：
Ryu, Hodon [1 ]
Gerrity, Daniel [1 ]
Crittenden, John C. [1 ]
Abbaszadegan, Morteza [1 ]
机构：
[1] Arizona State Univ, Natl Sci Fdn, Water Qual Ctr, Dept Civil & Environm Engn, Tempe, AZ 85287 USA
来源：
WATER RESEARCH | 2008年 / 42卷 / 6-7期
基金：
美国国家科学基金会;
关键词：
Cryptosporidium inactivation; UV/TiO2; photocatalysis; integrated cell culture quantitative PCR;
D O I：
10.1016/j.watres.2007.10.037
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
This study investigated the efficacy of low-pressure ultraviolet (UV) irradiation and the synergistic effect of UV/titanium dioxide (TiO2) photocatalysis on Cryptosporidium parvum oocyst inactivation. At UV doses of 2.7, 8.0, and 40 mJ/cm(2), oocyst inactivation was 1.3, 2.6, and 3.3log(10), respectively Reactive oxygen species (ROS) generated by longwave UV radiation (> 315 nm) and TiO2 achieved less than 0.28-log inactivation. However, the synergistic effect of germicidal (254 nm) UV and TiO2 resulted in 2-log and 3-log oocyst inactivation with 4.0 and 11.0 mJ/cm(2), respectively. Therefore, using TiO2 in combination with UV reduced the dose requirement for 3-log inactivation by 56%. An approximate 1-log decrease in inactivation of oocysts was observed with nanopure water in comparison to buffered water, whereas changes in pH from 6 to 8 had little effect on the photocatalytic inactivation of oocysts in either matrix (P>0.1). (c) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1523 / 1530
页数：8
相关论文
共 50 条
  • [1] Inactivation of Cryptosporidium parvum oocysts using medium- and low-pressure ultraviolet radiation
    Craik, SA
    Weldon, D
    Finch, GR
    Bolton, JR
    Belosevic, M
    WATER RESEARCH, 2001, 35 (06) : 1387 - 1398
  • [2] Inactivation and potential repair of Cryptosporidium parvum following low- and medium-pressure ultraviolet irradiation
    Zimmer, JL
    Slawson, RM
    Huck, PM
    WATER RESEARCH, 2003, 37 (14) : 3517 - 3523
  • [3] Inactivation mechanisms of cryptosporidium parvum oocysts by solar ultraviolet irradiation
    Liu, Yuanyuan
    Dong, Shengkun
    Kuhlenschmidt, Mark S.
    Kuhlenschmidt, Theresa B.
    Drnevich, Jenny
    Nguyen, Thanh H.
    ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY, 2015, 1 (02) : 188 - 198
  • [4] Low-pressure UV inactivation and DNA repair potential of Cryptosporidium parvum oocysts
    Shin, GA
    Linden, KG
    Arrowood, MJ
    Sobsey, MD
    APPLIED AND ENVIRONMENTAL MICROBIOLOGY, 2001, 67 (07) : 3029 - 3032
  • [5] INACTIVATION OF OOCYSTS OF CRYPTOSPORIDIUM-PARVUM BY ULTRAVIOLET-IRRADIATION
    CAMPBELL, AT
    ROBERTSON, LJ
    SNOWBALL, MR
    SMITH, HV
    WATER RESEARCH, 1995, 29 (11) : 2583 - 2586
  • [6] Photocatalytic inactivation of microorganisms in water under ultraviolet C irradiation and TiO2
    Taheri, Fatemeh
    Amini, Abolfazl
    Kouhsari, Ebrahim
    Kiaei, Mohammad Reza
    Movaseghi, Roja
    Niknejad, Farhad
    REVIEWS IN MEDICAL MICROBIOLOGY, 2020, 31 (02) : 79 - 85
  • [7] Inactivation of Cryptosporidium parvum by ultrasonic irradiation
    Oyane, I
    Furuta, M
    Stavarache, CE
    Hashiba, K
    Mukai, S
    Nakanishi, M
    Kimata, I
    Maeda, Y
    ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2005, 39 (18) : 7294 - 7298
  • [8] Inactivation of Cryptosporidium parvum oocysts by medium-pressure ultraviolet light
    Clancy, JL
    Bukhari, Z
    Bolton, JR
    Dussert, B
    PROVIDING SAFE DRINKING WATER IN SMALL SYSTEMS: TECHNOLOGY, OPERATIONS, AND ECONOMICS, 1999, : 151 - 154
  • [9] Evaluation of solar photocatalysis using TiO2 slurry in the inactivation of Cryptosporidium parvum oocysts in water
    Jesus Abeledo-Lameiro, Maria
    Ares-Mazas, Elvira
    Gomez-Couso, Hipolito
    JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY, 2016, 163 : 92 - 99
  • [10] Inactivation of Cryptosporidium parvum in drinking water by ultrasonic irradiation
    Li, S.-F. (lshaofeng@szpt.edu.cn), 1600, Chinese Society for Environmental Sciences (34):
12345