Degradation and mineralization of organic UV absorber compound 2-phenylbenzimidazole-5-sulfonic acid (PBSA) using UV-254Â nm/H2O2

- UV-254 nm/H2O2 AOP was utilized for the degradation and mineralization of PBSA and BSA.
- Promotion of kobs with [H2O2]0 ≤ 4 mM and inhibition at higher [H2O2]0 were observed.
- The S and N were released and monitored as SO42− and NH4+, respectively.
- Br− inhibited both the degradation and mineralization much more significantly than Cl−.
- There was an increase in [NH4+] at higher [H2O2]0 and its further destruction at higher UV fluence.