UV/PS showed higher DOC mineralization efficiency than UV/H2O2, direct UV photolysis could be negligible.
DOC mineralization showed 22% in UV/H2O2, and from 22 to 58% in UV/PS, at 10 mM oxidant condition, respectively.
V/PS show apparent first-order rate constant 4 fold higher than UV/H2O2.
Self-scavenging rate constant of SO4 smaller than OH.
The steady-state concentration of SO4 was 29 fold higher than ?OH at an oxidant dose of 10 mM.
EEM result reveals that UV/PS decrease humic-like peak, while UV/H2O2 decrease fulvic-like peak until 17 sec contact time. UV/PS vanished both humic-like peak and fulvic-like peak.
UV/H2O2 slightly decreased DOC, humic substances fraction, LMW acids fraction was increased.
UV/PS significantly decreased both the DOC and fraction of the individual NOM components
