Indirect photodegradation of ofloxacin in simulated seawater: Important roles of DOM and environmental factors

Dissolved organic matter (DOM) plays a non-negligible role in the indirect photodegradation of contaminants. This research investigated roles DOM and environmental factors (salinity, pH, NO 3 ? , HCO ) ofloxacin (OFX) simulated seawater. Results showed that can significantly accelerate OFX, 1 O 2 * were main reactive intermediates (RIs) could promote OFX. Fluorescence excitation–emission matrix spectroscopy–parallel factor analysis (EEMs-PARAFAC) was used to divide into four fluorescence components. The rate OFX affected by structure, terrigenous usually produced more RIs Increased salinity promotes while increased concentration had no effect on photodegradation. pH formation structure thereby affecting solution, which is due carbonate radical (CO ). study essential understanding providing novel insight fate, removal, transformation