Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10223410 | Chemosphere | 2019 | 29 Pages |
Abstract
We determined the potential interference of extracellular algal organic matter (EAOM) and intracellular algal organic matter (IAOM) extracted from Microcystis aeruginosa on MS2 bacteriophage inactivation under UV irradiation at two wavelengths (220 and 254â¯nm). UV irradiation at 220â¯nm doubled the inactivation rate of MS2 in water containing EAOM than in organic-free phosphate buffered solution. In contrast, EAOM did not change MS2 inactivation by exposure to UV 254â¯nm. The presence of IAOM did not significantly influence MS2 inactivation by exposure to either UV 254 or UV 220â¯nm. To achieve 3 log10 inactivation of MS2, UV254 nm required more than double the dose of UV220 nm (45â¯mJ/cm2 vs. 20â¯mJ/cm2). Linear correlations between the reduction in infectivity and the reduction in genome copies detected by reverse transcription quantitative polymerase chain reaction suggested that genomic damage is the main mechanism responsible for MS2 inactivation in water containing algal organic matter (AOM) by exposure to UV irradiation. These findings suggest that the presence of AOM did not negatively influence MS2 inactivation by either 220 or 254â¯nm irradiation, and that a lower UV dose of 220â¯nm irradiation can be used to achieve the same level of inactivation in water containing AOM.
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Authors
Yulin Wang, Elbashir Araud, Joanna L. Shisler, Thanh H. Nguyen, Baoling Yuan,