Work

Bisphenol AF degradation by persulfate activation based on Mn3O4@BiOI composite catalyst

Year: 2026

Type: article

Abstract: Catalyst activation of persulfate (PS) offers unique advantages for the treatment of endocrine-disrupting chemicals (EDCs) in wastewater. In this study, Mn 3 O 4 @BiOI composite catalysts were prepared using a hydrothermal synthesis method. The catalytic performance of the catalysts toward the activation of the reactive species produced by persulfate (PS) activation was investigated, as well as the subsequent Bisphenol AF (BPAF) degradation by these reactive species. The results indicate that Mn 3 O 4 @BiOI exhibits the highest efficiency in removing BPAF from water at a doping ratio of Mn 3 O 4 of 50%. The maximal catalyst dosage that promotes the BPAF degradation effect is 300 mg/L, and higher amounts inhibited the positive outcome; furthermore, acidic conditions also inhibited BPAF degradation. Furthermore, BPAF degradation was influenced by the presence of different anions: a certain concentration of HCO 3 − , the effect is promoted, the presence of Cl − and SO 4 2− inhibits the BPAF degradation process, and NO 3 − has a weaker impact on BPAF degradation within the Mn 3 O 4 @BiOI/PS system. Singlet oxygen ( 1 O 2 ), superoxide radicals (•O 2 − ), hydroxyl radicals (•OH) and sulfate radicals (SO4 •− ) are the primary active species generated in the Mn 3 O 4 @BiOI/PS system, was detected by free radical quenching assay and electron paramagnetic resonance (EPR). Based on X-ray Photoelectron Spectroscopy (XPS) analysis, these four active oxygen species act together to promote the oxidative decomposition of BPAF. Among them, SO 4 •− , •OH, and 1 O 2 play crucial roles. During the catalytic process, active substances are produced via the oxidation–reduction of Mn(IV)/Mn(III)/Mn(II) and Bi(V)/Bi(III), and oxygen vacancies (OV s ) are also important in promoting the removal of organic pollutants.

Source: Environmental Sciences Europe

DOI: 10.1186/s12302-026-01343-6

Authors: Changling Liu, Jian Zhang, Kefeng Li, Yuanming Wang

Institutions: Sichuan University, PowerChina (China), State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan College of Architectural Technology

Language: English

Topic: Advanced oxidation water treatment

Subfield: Water Science and Technology

Field: Environmental Science

Domain: Physical Sciences

SDGs: Clean water and sanitation, Responsible consumption and production

Open Access status: gold

Estimated APC paid: $3,290