Work

Optimization of parameters for electro Fenton degradation of anion resin by response surface methodology

Year: 2026

Type: article

Abstract: This study focused on improving the degradation efficiency of waste resin wet oxidation and optimizing hydrogen peroxide utilization through an electro-Fenton system based on Ti/PbO 2 (Ti-DSA) electrodes for the degradation of ZGCNR170 anion resin. A Box–Behnken experimental framework was utilized to comprehensively assess the effects of key operational parameters, including current intensity, catalyst dosage, and H 2 O 2 dosing rate, enabling the determination of optimal degradation conditions. Analysis of individual factors revealed that each variable significantly affected resin degradation, with their relative influence ranked in the following order: FeSO 4 dosage > H 2 O 2 dosage > initial pH > current intensity. Three-dimensional response surface analysis combined with ANOVA revealed significant interactions among the process variables in the electro-Fenton system. The ratio of FeSO 4 to H 2 O 2 was identified as a key determinant for achieving efficient degradation of spent resin. Besides, the optimal degradation efficiency was achieved at pH 1.5, with a current of 7 A, FeSO 2 dosage of 52.1 g, and an H 2 O 2 dosing rate of 50 mL/min. Under the condition of optimal range, increasing current intensity and maintaining a moderately low pH enhanced resin degradation; however, excessive current adversely affected efficiency. These findings provide a reliable basis for optimizing electro-Fenton systems for the effective treatment of radioactive anion exchange resins.

Source: Scientific Reports

DOI: 10.1038/s41598-026-37155-0