Analytical determinations A Waters UPLC with a

The isomeric intermediates, P377 and P′377 as well as P401 and P′401, were found for LEV and SAR, respectively, and they responded with the notable abundance in the TIC (Fig. S5). In previous studies, similar products such as P377, P401 and P393 were detected from solar Fenton treatment (Michael et al., 2013) and MnO2 oxidative transformation of FQs (Zhang and Huang, 2005). For LEV, the same intermediate, P359, was also found from solar Fenton degradation (Michael et al., 2013) and solar degradation in soil (Sturini et al., 2014).