BiVO4/MnO2 Composite Photocatalytic Material for the Shale Gas Flowback Wastewater Treatment:: Science Publishing Group

BiVO₄/MnO₂ Composite Photocatalytic Material for the Shale Gas Flowback Wastewater Treatment

Yanling Liu¹, Zhengxin Yang¹, Longjun Xu¹, Chenglun Liu^1,2, Teng Zhang¹, Zao Jiang¹

¹State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, China

²School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, China

Modern Chemistry, Volume 9, Issue 3, September 2021

Pages: 68-72

Received: Sep. 07, 2021

Accepted: Sep. 27, 2021

Published: Sep. 29, 2021

DOI: 10.11648/j.mc.20210903.14

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Abstract

The management and disposal of the shale gas flowback wastewater is one of the greatest challenges associated with the exploration and extraction of unconventional natural gas resources. High salinity and complex chemical composition of fracturing fluids are the main limiting factors for beneficial reuse of the shale gas flowback wastewater, which has become a tough problem in the global environmental field. In this study, a composite photocatalytic oxidant of MnO₂ modified BiVO₄ was successfully synthesized with one-step hydrothermal method, and used to treat the shale gas flowback wastewater. The synergistic effect of photocatalysis and oxidation has made a great contribution to the removal of COD value in wastewater. When catalyst dosage was 0.6 g, the pH value was controlled to 3, and visible light exposure was 4 h, the prepared BiVO₄/MnO₂ exhibited the optimum photocatalytic oxidation activity, and the removal efficiency of COD could reach 65.5%, which is better than that of pure BiVO₄ or MnO₂. Furthermore, in this case, the COD value could be decreased from 188 mg/L to 64.9 mg/L, complying with the first-level standard limit requirements in the integrated wastewater discharge standard (GB8978-1996). Moreover, in the viewpoint of dynamics, Langmuir isothermal-like equation can better describe the relationship between COD removal efficiency and illumination time.

Keywords

Shale Gas Flowback Wastewater, Photocatalytic Technology, BiVO₄/MnO₂

To cite this article

Yanling Liu, Zhengxin Yang, Longjun Xu, Chenglun Liu, Teng Zhang, et al. (2021). BiVO4/MnO2 Composite Photocatalytic Material for the Shale Gas Flowback Wastewater Treatment. Modern Chemistry, 9(3), 68-72. https://doi.org/10.11648/j.mc.20210903.14

Copyright © 2021 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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