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<p>Membrane-based separation offers a sustainable route for resource recovery from high-salinity organic wastewater, yet graphene oxide (GO) membranes remain constrained by poor selectivity, limited solvent stability, and challenges in scale-up. Here, we report a hydroxylated single-walled carbon nanotube (SWCNT-OH) reinforced GO membrane, in which SWCNT-OH promotes robust inorganic crosslinking with sodium tetraborate (Na<sub>2</sub>B<sub>4</sub>O<sub>7</sub>) to form rapid transport channels for water and ions, while suppressing organic passage. This architecture enhances the moxifloxacin (MXF)/NaCl separation factor more than fivefold (from 4.2 to 22.2) and increases water permeability over fourfold (from 7.2 to 30.1 l m<sup>−2</sup> h<sup>−1</sup> bar<sup>−1</sup>). The membrane was scaled up to 11 m<sup>2</sup> and deployed for continuous treatment of MXF crystallization mother liquor over seven days, delivering a stable recovery of 10 kg MXF per day under industrially relevant conditions. These findings establish a scalable strategy for the design of robust nanocarbon-based membranes, advancing resource-efficient treatment of high-salinity wastewater.</p>

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Robust SWCNT-OH/GO membranes for scalable recovery of moxifloxacin from high-salinity organic wastewater

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月3日

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  • Yechen An,
  • Liang Mei,
  • Ruijie Yang,
  • Jun Cui,
  • Wenhai Zhang,
  • Jing-Long Han,
  • Wenli Jiang,
  • Ruiyun Ren,
  • Xiaoxu Gao,
  • Zhihui He,
  • Haoran Xu,
  • Ruifeng Yan,
  • Quan-Fu An,
  • Zhiling Li,
  • Haoyi Cheng,
  • Yu Tao,
  • Aijie Wang,
  • Zhiyuan Zeng

摘要

Membrane-based separation offers a sustainable route for resource recovery from high-salinity organic wastewater, yet graphene oxide (GO) membranes remain constrained by poor selectivity, limited solvent stability, and challenges in scale-up. Here, we report a hydroxylated single-walled carbon nanotube (SWCNT-OH) reinforced GO membrane, in which SWCNT-OH promotes robust inorganic crosslinking with sodium tetraborate (Na2B4O7) to form rapid transport channels for water and ions, while suppressing organic passage. This architecture enhances the moxifloxacin (MXF)/NaCl separation factor more than fivefold (from 4.2 to 22.2) and increases water permeability over fourfold (from 7.2 to 30.1 l m−2 h−1 bar−1). The membrane was scaled up to 11 m2 and deployed for continuous treatment of MXF crystallization mother liquor over seven days, delivering a stable recovery of 10 kg MXF per day under industrially relevant conditions. These findings establish a scalable strategy for the design of robust nanocarbon-based membranes, advancing resource-efficient treatment of high-salinity wastewater.