MS2 coliphage inactivation by Al/Fe PILC-activated Catalytic Wet Peroxide Oxidation: multiresponse statistical optimization.

It is remarkable that our results under optimal multi-response conditions still showed a decreasing trend of the MS2 titer arriving to 100 min ​of experiment (70 min of reaction, Fig. 6 ), which suggests that increasing the time of treatment could lead to even higher MS2 inactivation.

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Moreover, it is remarkable the close-to-significant effect exerted by the initial DOC on the MS2 inactivation (p-value just slightly over 0.05); it probably suggests that ROS other than just hydroxyl and hydroperoxyl radicals, for instance those promoted by the presence of dissolved NOM under circumneutral pH and natural solar light irradiation (let's say, triplet states of the hydrophobic fraction in NOM) may be are playing a role in the viral inactivation, at least within the range of low levels of DOC featuring real surface waters and peroxide doses here evaluated, as recently reported for bacterial disinfection ( Porras et al., 2018 ).

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