Improving membrane distillation performance by Fe(II) activated sodium percarbonate oxidation during the treatment of shale gas produced water.

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  • Additional Information
    • Source:
      Publisher: Pergamon Press Country of Publication: England NLM ID: 0105072 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-2448 (Electronic) Linking ISSN: 00431354 NLM ISO Abbreviation: Water Res Subsets: MEDLINE
    • Publication Information:
      Original Publication: Oxford, Pergamon Press.
    • Subject Terms:
      Distillation*/methods ; Membranes, Artificial* ; Carbonates*/chemistry ; Oxidation-Reduction*; Water Purification/methods ; Iron/chemistry ; Hydrophobic and Hydrophilic Interactions
    • Abstract:
      Membrane distillation (MD) offers promise for recycling shale gas produced water (SGPW), while membrane fouling is still a major obstacle in standalone MD. Herein, sodium percarbonate (SPC) oxidation was proposed as MD pretreatment, and the performance of the single MD, SPC-MD hybrid process and Fe(II)/SPC-MD hybrid process for SGPW treatment were systematically evaluated. Results showed that compared to raw SGPW, the application of SPC and Fe(II)/SPC led to the decrease of the fluorescent organics by 28.54 % and 54.52 %, respectively. The hydrophobic fraction decreased from 52.75 % in raw SGPW to 37.70 % and 27.20 % for SPC and Fe(II)/SPC, respectively, and the MD normalized flux increased from 0.19 in treating raw SGPW to 0.65 and 0.81, respectively. The superiority of SPC oxidation in reducing the deposited membrane foulants and restoring membrane properties was further confirmed through scanning electron microscopy observation, attenuated total reflection fourier transform infrared, water contact angle and surface tension analyses of fouled membranes. Correlation analysis revealed that hydrophobic/hydrophilic matters and fluorescent organics in SGPW took a crucial role in MD fouling. The mechanism of MD fouling mitigation by Fe(II)/SPC oxidation was attributed to the decrease in concentrations and hydrophobicity of organic by synergistic oxidation, coagulation and adsorption.
      Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
      (Copyright © 2024 Elsevier Ltd. All rights reserved.)
    • Contributed Indexing:
      Keywords: Fe(II); Membrane distillation (MD); Membrane fouling; Shale gas produced water (SGPW); Sodium percarbonate (SPC) oxidation
    • Accession Number:
      0 (Membranes, Artificial)
      0 (Carbonates)
      Z7G82NV92P (sodium percarbonate)
      E1UOL152H7 (Iron)
    • Publication Date:
      Date Created: 20240728 Date Completed: 20240816 Latest Revision: 20240816
    • Publication Date:
      20240818
    • Accession Number:
      10.1016/j.watres.2024.122139
    • Accession Number:
      39068730