TY - JOUR
T1 - Roles of singlet oxygen and triplet excited state of dissolved organic matter formed by different organic matters in bacteriophage MS2 inactivation
AU - Rosado-Lausell, Sahid L.
AU - Wang, Hanting
AU - Gutiérrez, Leonardo A.
AU - Romero-Maraccini, Ofelia C.
AU - Niu, Xi-Zhi
AU - Gin, Karina
AU - Croue, Jean-Philippe
AU - Nguyen, Thanh Ha
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: We acknowledge the financial support of the Academic Excellence Alliance (AEA) program at King Abdullah University of Science and Technology (KAUST), NSF 1066152, Safe Global Water Institute at University of Illinois, NSF EAPSI OISE-1209310, and NSF CAREER grants. Ee Ling Yong, Gan Jie, Chenxi Sun, and Tung Nguyen (National University of Singapore) are acknowledged for helping with experiments conducted in Singapore.
PY - 2013/9
Y1 - 2013/9
N2 - Inactivation of bacteriophage MS2 by reactive oxygen species (ROS) and triplet excited state of dissolved organic matter (3DOM*) produced by irradiation of natural and synthetic sensitizers with simulated sunlight of wavelengths greater than 320nm was investigated. Natural sensitizers included purified DOM isolates obtained from wastewater and river waters, and water samples collected from Singapore River, Stamford Canal, and Marina Bay Reservoir in Singapore. Linear correlations were found between MS2 inactivation rate constants (kobs) and the photo-induced reaction rate constants of 2,4,6-trimethylphenol (TMP), a probe compound shown to react mainly with 3DOM*. Linear correlations between MS2 kobs and singlet oxygen (1O2) concentrations were also found for both purified DOM isolates and natural water samples. These correlations, along with data from quenching experiments and experiments with synthetic sensitizers, Rose Bengal (RB), 3'-methoxyacetophenone (3'-MAP), and nitrite (NO2-), suggest that 1O2, 3DOM*, and hydroxyl radicals (•OH) could inactivate bacteriophage MS2. Linear correlations between MS2 kobs and Specific Ultraviolet Absorption determined at 254nm (SUVA254) were also found for both purified DOM isolates and natural samples. These results suggest the potential use of TMP as a chemical probe and SUVA254 as an indicator for virus inactivation in natural and purified DOM water samples. © 2013 Elsevier Ltd.
AB - Inactivation of bacteriophage MS2 by reactive oxygen species (ROS) and triplet excited state of dissolved organic matter (3DOM*) produced by irradiation of natural and synthetic sensitizers with simulated sunlight of wavelengths greater than 320nm was investigated. Natural sensitizers included purified DOM isolates obtained from wastewater and river waters, and water samples collected from Singapore River, Stamford Canal, and Marina Bay Reservoir in Singapore. Linear correlations were found between MS2 inactivation rate constants (kobs) and the photo-induced reaction rate constants of 2,4,6-trimethylphenol (TMP), a probe compound shown to react mainly with 3DOM*. Linear correlations between MS2 kobs and singlet oxygen (1O2) concentrations were also found for both purified DOM isolates and natural water samples. These correlations, along with data from quenching experiments and experiments with synthetic sensitizers, Rose Bengal (RB), 3'-methoxyacetophenone (3'-MAP), and nitrite (NO2-), suggest that 1O2, 3DOM*, and hydroxyl radicals (•OH) could inactivate bacteriophage MS2. Linear correlations between MS2 kobs and Specific Ultraviolet Absorption determined at 254nm (SUVA254) were also found for both purified DOM isolates and natural samples. These results suggest the potential use of TMP as a chemical probe and SUVA254 as an indicator for virus inactivation in natural and purified DOM water samples. © 2013 Elsevier Ltd.
UR - http://hdl.handle.net/10754/562940
UR - https://linkinghub.elsevier.com/retrieve/pii/S0043135413004260
UR - http://www.scopus.com/inward/record.url?scp=84883308714&partnerID=8YFLogxK
U2 - 10.1016/j.watres.2013.05.018
DO - 10.1016/j.watres.2013.05.018
M3 - Article
C2 - 23866126
SN - 0043-1354
VL - 47
SP - 4869
EP - 4879
JO - Water Research
JF - Water Research
IS - 14
ER -