Application of Fenton and UV–Fenton Reaction for Resin Wastewater Treatment Detection of Residual H₂O₂

The Fenton and UV–Fenton procedures were utilized in this study to eliminate total organic carbon (TOC) from wastewater generated during actual resin manufacturing. Optimal operating parameter values influencing removal efficiency were identified, including initial H 2 O 2 and Fe 2+ concentrations and total reaction time ( t ). The residual H 2 O 2 concentration was measured using the metavanadate method in all processes. The results indicated that the Fenton process achieved a TOC removal rate of 32.0% at concentrations of 500 mg L −1 for H 2 O 2 and 100 mg L −1 for Fe 2+ , with a constant pH of 3.78 and a reaction time of 6 h. In the UV–Fenton process, H 2 O 2 concentrations of 500 and 1000 mg L −1 were examined, resulting in 14% and 15% TOC removal efficiencies, respectively. The effect of gradually adding H 2 O 2 on the removal efficiency was also investigated in this study. To do this, the Fenton process started with an initial H 2 O 2 concentration of 250 mg L −1 . Once approximately 80% of this amount was consumed, 250 mg L −1 H 2 O 2 was added, and the process continued. A maximum TOC removal of about 71% was achieved by gradually adding H 2 O 2 at a 4000 mg L −1 concentration. On the basis of these findings, the gradual addition of H 2 O 2 , as opposed to an initial dose, proved to be a significant and practical method for removing organic matter from wastewater in the Fenton process.