Coupling iron-carbon micro-electrolysis with persulfate advanced oxidation for hydraulic fracturing return fluid treatment

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Mina Luo
  • Hanchao Yang
  • Kuntai Wang
  • Fang Song
  • Yunhui Zhang
  • Cheng Zhong

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number137415
Journal / PublicationChemosphere
Volume313
Online published1 Dec 2022
Publication statusPublished - Feb 2023

Abstract

Improving the sustainability of the hydraulic fracturing water cycle of unconventional oil and gas development needs an advanced water treatment that can efferently treat flowback and produced water (FPW). In this study, we developed a robust two-stage process that combines flocculation, and iron-carbon micro-electrolysis plus sodium persulfate (ICEPS) advanced oxidation to treat field-based FPW from the Sulige tight gas field, China. Influencing factors and optimal conditions of the flocculation-ICEPS process were investigated. The flocculation-ICEPS system at optimal conditions sufficiently removed the total organic contents (95.71%), suspended solids (92.4%), and chroma (97.5%), but the reaction stoichiometric efficiency (RSE) value was generally less than 5%. The particles and chroma were effectively removed by flocculation, and the organic contents was mainly removed by the ICEPS system. Fourier-transform infrared spectroscopy (FTIR) analysis was performed to track the changes in FPW chemical compositions through the oxidation of the ICEPS process. Multiple analyses demonstrated that PS was involved in the activation of Fe oxides and hydroxides accreted on the surface of the ICE system for FPW treatment, which led to increasing organics removal rate of the ICEPS system compared to the conventional ICE system. Our study suggests that the flocculation-ICEPS system is a promising FPW treatment process, which provides technical and mechanistic foundations for further field application.

Research Area(s)

  • Flowback and produced water, Hydraulic fracturing, Iron-carbon micro-electrolysis, Persulfate advanced oxidation, Wastewater treatment

Citation Format(s)

Coupling iron-carbon micro-electrolysis with persulfate advanced oxidation for hydraulic fracturing return fluid treatment. / Luo, Mina; Yang, Hanchao; Wang, Kuntai et al.
In: Chemosphere, Vol. 313, 137415, 02.2023.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review