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Heterogeneous Fenton treatment of shale gas fracturing flow-back wastewater by spherical Fe/Al2O3 catalyst

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Abstract

In this work, efficient Fenton strategy have been proposed for degradation of shale gas fracturing flow-back wastewater using the spherical Fe/Al2O3 supported catalyst. Prior to actual fracturing fluid treatment, the typical model wastewaters such as p-nitrophenol and polyacrylamide were employed to evaluate the catalytic properties of prepared catalyst, and then Fenton treatment of the shale gas fracturing flow-back wastewater was performed on the self-assembled catalytic degradation reactor for continuous flow purification. Results showed that under the conditions of 0.25 mol L−1 impregnating concentration, pH 4, 50 g L−1 catalyst and 0.75 mL L−1 30% H2O2, the removal efficiency of p-nitrophenol and polyacrylamide reached 74% and 61%, respectively, while the COD removal of fracturing flow-back fluid was approximately 48% with the residual 88 mg L−1 COD, meeting the emission standards of the integrated wastewater discharge standard (GB 8978-1996, COD < 100 mg L−1). This work offers new alternatives for Fenton treatment of real wastewater by efficient and low-cost supported catalysts.

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Funding

This study was supported by the National Science and Technology Major Project (Grant No. 2016ZX05040003), the Applied Research Project of Qingdao postdoctoral Researchers (Grant No. ZX20220198), and Independent innovation research project (Grant No. 22CX06017A).

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Pei Dong: conceptualization, investigation, writing—original draft. Peipei Shan: methodology, software, investigation. Shuaijun Wang: data curation, formal analysis. Baosheng Ge: methodology, supervision. Chaocheng Zhao: project administration, writing—review and editing. All authors critically revised the work.

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Correspondence to Chaocheng Zhao.

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Dong, ., Shan, P., Wang, S. et al. Heterogeneous Fenton treatment of shale gas fracturing flow-back wastewater by spherical Fe/Al2O3 catalyst. Environ Sci Pollut Res 30, 105685–105699 (2023). https://doi.org/10.1007/s11356-023-29687-z

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  • DOI: https://doi.org/10.1007/s11356-023-29687-z

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