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<p>A novel thin-film nanocomposite (TFN) membrane was developed for desalination using the forward osmosis (FO) process. The membranes were modified with a polyoxovanadate/zeolite (POV/Z) nanocomposite, composed of (NH<sub>4</sub>)<sub>4</sub>Na<sub>2</sub>(V<sub>10</sub>O<sub>28</sub>).10H<sub>2</sub>O and zeolite X, embedded within the polyamide (PA) selective layer. The aim of this study was to design nanocomposites incorporating hydrophilic zeolite X particles with tailored pore structures to enhance desalination efficiency and fouling resistance. The addition of the hydrophilic polyoxometalate (POM), (NH<sub>4</sub>)<sub>4</sub>Na<sub>2</sub>(V<sub>10</sub>O<sub>28</sub>).10H<sub>2</sub>O, facilitated the formation of high-quality, defect-free TFN membrane surfaces exhibiting superior water flux and antifouling performance. Among the prepared membranes, TFN-PZ<sub>2</sub> (containing 0.05 wt% POV/Z) achieved the highest desalination performance in the FO process. Compared to conventional thin-film composite (TFC) and zeolite-modified TFN-Z<sub>2</sub> membranes, the TFN-PZ<sub>2</sub> membrane demonstrated a remarkable improvement in water flux and fouling resistance, confirming its potential as an optimal candidate for desalination applications. Furthermore, the TFN-PZ<sub>2</sub> membrane exhibited an impressive Cd<sup>2+</sup> rejection rate of 97.37%, indicating its strong capability for heavy metal removal.</p>

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Design and synthesis of a novel polyoxovanadate–zeolite nanocomposite membrane for efficient desalination and heavy metal removal via forward osmosis

  • 期刊论文

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  • 发表日期：

    2026年7月2日

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  • Mojtaba Amini,
  • Mohammad Nikkhoo,
  • Mojtaba Bagherzadeh,
  • Farzad Seidi

摘要

A novel thin-film nanocomposite (TFN) membrane was developed for desalination using the forward osmosis (FO) process. The membranes were modified with a polyoxovanadate/zeolite (POV/Z) nanocomposite, composed of (NH4)4Na2(V10O28).10H2O and zeolite X, embedded within the polyamide (PA) selective layer. The aim of this study was to design nanocomposites incorporating hydrophilic zeolite X particles with tailored pore structures to enhance desalination efficiency and fouling resistance. The addition of the hydrophilic polyoxometalate (POM), (NH4)4Na2(V10O28).10H2O, facilitated the formation of high-quality, defect-free TFN membrane surfaces exhibiting superior water flux and antifouling performance. Among the prepared membranes, TFN-PZ2 (containing 0.05 wt% POV/Z) achieved the highest desalination performance in the FO process. Compared to conventional thin-film composite (TFC) and zeolite-modified TFN-Z2 membranes, the TFN-PZ2 membrane demonstrated a remarkable improvement in water flux and fouling resistance, confirming its potential as an optimal candidate for desalination applications. Furthermore, the TFN-PZ2 membrane exhibited an impressive Cd2+ rejection rate of 97.37%, indicating its strong capability for heavy metal removal.