The Role of Natural Organic Matter in the Degradation of Phenolic Pollutants by Sulfate Radical Oxidation: Radical Scavenging vs Reduction

Dissolved natural organic matter (NOM) significantly influences the performance of water treatment processes. It is generally recognized that NOM acts as a radical scavenger, thus inhibiting the degradation of organic pollutants in advanced oxidation processes (AOPs). This study examined the impacts of 8 different NOM isolates on the degradation of 4-chlorophenol (CP), a representative phenolic pollutant, in sulfate radical (SO4•–)-based AOPs. We developed an improved probe method to measure the steady-state concentration of SO4•– ([SO4•–]ss) in both the absence and presence of NOM. Results show that adding 1.00 mgC L–1 NOM resulted in only a 1.3–3.4% decrease in [SO4•–]ss. However, the apparent rate constants…

• NN
  National Natural Science Foundation of China

  Award: 22076079