Degradation of the UV Filter Benzophenone-4 by Ferrate (VI) in Aquatic Environments Rouyi

This work demonstrates the potential utility of ferrate(VI)-based advanced oxidation processes for the degradation of a representative UV filter, BP-4. The operational parameters of oxidant dose and temperature were determined with kinetic experiments. In addition, the effects of water constituents including anions (Cl-, HCO3-, NO3-, SO42), cations (Na+, K+, Ca2+, Mg2+, Cu2+, Fe3+), and humic acid (HA) were investigated. Results suggested that the removal rate of BP-4 (5 mg/L) could reach 95% in 60 min, when [Fe(VI)]:[BP-4] = 100:1, T = 25 degrees C and pH = 7.0, The presence of K+, Cu2+ and Fe3+ could promote the removal of BP-4, but Cl-, SO42-, NO3-, HA and Na+ could significantly inhibit the removal of BP-4. Furthermore, this Fe(VI) oxidation processes has good feasibility in real water samples. These results may provide useful information for the environmental elimination of benzophenone-type UV filters by Fe(VI).

Automated summary

This study demonstrates the potential utility of ferrate(VI)-based advanced oxidation processes for the degradation of BP-4 UV filter. The operational parameters were determined and the effects of water constituents were investigated. The results showed that BP-4 removal rate could reach 95% under specific conditions.