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<p>The increasing concentration of heavy metal contamination, especially arsenic, in water resources presents significant risks to both human health and overall water quality. This study examines the adsorption efficiency of TiO<sub>2</sub> and Al<sub>2</sub>O<sub>3</sub> powders for arsenic removal from drinking water. Fourier-transform infrared spectroscopy, Brunauer–Emmett–Teller, and zeta potential were used to investigate the correlation between adsorbent properties and performance. Modularized adsorbents, specifically hollow-fiber and carbon block formats, were introduced and demonstrated outstanding arsenic removal efficiency. In particular, the TiO<sub>2</sub>-based adsorbents achieved over 99.9% arsenic removal in simulated and actual drinking water. In a pilot test, the hollow-fiber module maintained complete removal for over 16&#xa0;days using real groundwater. The study emphasizes the crucial role of surface charge and hydroxyl groups in arsenic adsorption, demonstrating the practical effectiveness of these innovative adsorbents in large-scale water purification systems.</p> Graphical Abstract <p></p>

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Advanced TiO2 and Al2O3 Modularized Adsorbents and Practical Application Strategies for Enhanced Arsenic Removal from Water

  • 期刊论文

  • 发表日期：

    2025年5月15日

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  • Younghee Jang,
  • Sung Su Kim,
  • D. Duc Nguyen

摘要

The increasing concentration of heavy metal contamination, especially arsenic, in water resources presents significant risks to both human health and overall water quality. This study examines the adsorption efficiency of TiO2 and Al2O3 powders for arsenic removal from drinking water. Fourier-transform infrared spectroscopy, Brunauer–Emmett–Teller, and zeta potential were used to investigate the correlation between adsorbent properties and performance. Modularized adsorbents, specifically hollow-fiber and carbon block formats, were introduced and demonstrated outstanding arsenic removal efficiency. In particular, the TiO2-based adsorbents achieved over 99.9% arsenic removal in simulated and actual drinking water. In a pilot test, the hollow-fiber module maintained complete removal for over 16 days using real groundwater. The study emphasizes the crucial role of surface charge and hydroxyl groups in arsenic adsorption, demonstrating the practical effectiveness of these innovative adsorbents in large-scale water purification systems.

Graphical Abstract