Heterogeneous electro-Fenton catalysis with self-supporting CFP@MnO2-Fe3O4/C cathode for shale gas fracturing flowback wastewater

Abstract

© 2021 Elsevier B.V. Self-supporting electrodes have triggered great interests in improving electro-Fenton (EF) system for degradation of refractory organic pollutants. In this work, a novel self-supporting carbon fiber paper (CFP) electrode modified by transition metals, e.g. Fe and Mn, was fabricated and employed as a heterogeneous EF cathode. The prepared electrode exhibited excellent degradation for a number of typical organic pollutants along with superior stability. Remarkably, a high removal efficiency was achieved in the EF treatment of shale gas fracturing flowback wastewater. Results indicated that 65.2% TOC and 74.8% COD were eliminated after 4 h degradation. The residual COD value of the real wastewater was 80 mg L−1, meeting the emission requirement of the integrated wastewater discharge standard (COD ＜ 100 mg L−1) with a low specific energy consumption of 6.9 kWh kg−1 COD−1. This work demonstrates a competing alternative for efficient decontamination of real wastewater using an electro-Fenton strategy with a low-cost electrode.

RAS ID

32806

Document Type

Journal Article

Date of Publication

2021

Volume

412

Funding Information

National Science and Technology Major Project

School

School of Engineering

Copyright

subscription content

Publisher

Elsevier

Comments

Dong, P., Chen, X., Guo, M., Wu, Z., Wang, H., Lin, F., ... Sun, H. (2021). Heterogeneous electro-Fenton catalysis with self-supporting CFP@ MnO2-Fe3O4/C cathode for shale gas fracturing flowback wastewater. Journal of Hazardous Materials, 412, article 125208. https://doi.org/10.1016/j.jhazmat.2021.125208

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Link to publisher version (DOI)

10.1016/j.jhazmat.2021.125208