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<p>Anionic surfactant in wastewater poses serious environmental risks, and conventional treatment methods often fail to degrade them completely. Titanium dioxide (TiO<sub>2</sub>) is a widespread photocatalyst, but its limited efficiency under visible light remains a challenge. While Fe doping and magnetic functionalization enhance TiO<sub>2</sub> photocatalysis, existing methods rely on costly and high-purity reagents. This study introduces a sustainable approach by repurposing iron rust waste to synthesize Fe-doped and Fe<sub>3</sub>O<sub>4</sub>-magnetized TiO<sub>2</sub> (TiO<sub>2</sub>-Fe/Fe<sub>3</sub>O<sub>4</sub>) via hydrothermal Fe doping and Fe<sub>3</sub>O<sub>4</sub> magnetization through co-precipitation. The photocatalysts were tested for anionic surfactant of sodium dodecylbenzenesulfonate (SDBS) degradation under varying conditions. TiO<sub>2</sub>-Fe/Fe<sub>3</sub>O<sub>4</sub> achieved 93.26% SDBS degradation under visible light at pH 6, with 0.5&#xa0;g/L photocatalyst and 60&#xa0;min of irradiation. This study successfully utilized iron rust waste to convert into beneficial material in enhancing the TiO<sub>2</sub> that can be magnetically recovered and visible-light-activated. These dual benefits of increased photocatalytic efficiency and easy separation provide a cost-effective as well as eco-friendly solution for surfactant degradation in wastewater treatment.</p>

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Iron Rust-Derived TiO2-Fe/Fe3O4: A Visible-Light-Activated Photocatalyst for Anionic Surfactant Degradation in Laundry Wastewater

  • 期刊论文

  • 发表日期：

    2026年1月12日

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  • Eka Pratista,
  • Early Zahwa Alharissa,
  • Endang Tri Wahyuni,
  • Mudasir Mudasir

摘要

Anionic surfactant in wastewater poses serious environmental risks, and conventional treatment methods often fail to degrade them completely. Titanium dioxide (TiO2) is a widespread photocatalyst, but its limited efficiency under visible light remains a challenge. While Fe doping and magnetic functionalization enhance TiO2 photocatalysis, existing methods rely on costly and high-purity reagents. This study introduces a sustainable approach by repurposing iron rust waste to synthesize Fe-doped and Fe3O4-magnetized TiO2 (TiO2-Fe/Fe3O4) via hydrothermal Fe doping and Fe3O4 magnetization through co-precipitation. The photocatalysts were tested for anionic surfactant of sodium dodecylbenzenesulfonate (SDBS) degradation under varying conditions. TiO2-Fe/Fe3O4 achieved 93.26% SDBS degradation under visible light at pH 6, with 0.5 g/L photocatalyst and 60 min of irradiation. This study successfully utilized iron rust waste to convert into beneficial material in enhancing the TiO2 that can be magnetically recovered and visible-light-activated. These dual benefits of increased photocatalytic efficiency and easy separation provide a cost-effective as well as eco-friendly solution for surfactant degradation in wastewater treatment.