Silica‑assisted Fe-Mn bimetallic oxide/conductive carbon black composite in 3D electro‑Fenton system for degradation of tetracycline.

Authors

Yuchao Zhang, Xiaodong Si, Jiemin Xue, Lili Gao, Xuelian Li, Kai Qi

Published in

Environmental science and pollution research international. Aug 03, 2026. Epub Aug 03, 2026.

Abstract

Antibiotic contamination demands efficient remediation technologies. Although three-dimensional Electro-Fenton (3D-EF) systems show promise, conventional granular electrodes suffer from rapid deactivation and poor conductivity. Herein, we report a ternary Fe-Mn composite granular electrode for tetracycline (TC) degradation. The electrode integrates three synergistic functionalities: (i) iron-manganese oxides as the primary active phase, where Fe-Mn redox synergy accelerates Fe(II) regeneration; (ii) silica incorporation to fortify the oxide layer and enhance structural stability; and (iii) conductive carbon black doping to improve electrical conductivity and electron transfer. The system achieved 95% TC removal within 120 min. Characterization confirmed the structural and electrochemical advantages, while mechanistic studies identified singlet oxygen (¹O₂) as the dominant reactive species. This work provides a durable, high-performance granular electrode for practical 3D-EF treatment of antibiotic pollutants.

PMID:
42545616
Bibliographic data and abstract were imported from PubMed on 03 Aug 2026.

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