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<p>Arsenic contamination in natural water sources is a well-known worldwide problem due to its severe health and environmental implications. In this study, Fe-enriched soil, an abundant and low-cost natural material, was investigated as an environmentally friendly adsorbent for arsenic removal from contaminated water. The main objective was to evaluate its adsorption performance and to assess the viability of reusing the spent material as a raw component in ceramic bricks, thereby promoting a safe immobilization of arsenic and a sustainable management of the waste. The Fe-enriched soil has been fully characterized and tested for arsenic removal in synthetic aqueous solutions. The adsorption process followed a pseudo-second-order model and was well described by a Freundlich isotherm, achieving an adsorption capacity of &gt; 0.5&#xa0;mg g⁻¹ and a removal efficiency of 60% within 24&#xa0;h. The arsenic-loaded laterite soil was successfully incorporated into ceramic bricks, and subjected to leaching tests, which confirmed that the immobilization process effectively retained over 85% of the arsenic. As a result, the Fe-enriched soil proved to be a potential natural adsorbent for As(V), and safely reused in ceramic materials, offering a sustainable route for mitigating arsenic pollution and minimizing waste impact on the environment.</p> Graphical abstract <p></p>

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Laterite Soil for As(V) Removal: Adsorption Efficiency Assessment and Subsequent Immobilization in Ceramic Bricks

  • 期刊论文

  • 发表日期：

    2026年5月11日

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  • Lucía Yohai,
  • Daiana Simón,
  • Sergio Pellice,
  • Adrián Cristóbal

摘要

Arsenic contamination in natural water sources is a well-known worldwide problem due to its severe health and environmental implications. In this study, Fe-enriched soil, an abundant and low-cost natural material, was investigated as an environmentally friendly adsorbent for arsenic removal from contaminated water. The main objective was to evaluate its adsorption performance and to assess the viability of reusing the spent material as a raw component in ceramic bricks, thereby promoting a safe immobilization of arsenic and a sustainable management of the waste. The Fe-enriched soil has been fully characterized and tested for arsenic removal in synthetic aqueous solutions. The adsorption process followed a pseudo-second-order model and was well described by a Freundlich isotherm, achieving an adsorption capacity of > 0.5 mg g⁻¹ and a removal efficiency of 60% within 24 h. The arsenic-loaded laterite soil was successfully incorporated into ceramic bricks, and subjected to leaching tests, which confirmed that the immobilization process effectively retained over 85% of the arsenic. As a result, the Fe-enriched soil proved to be a potential natural adsorbent for As(V), and safely reused in ceramic materials, offering a sustainable route for mitigating arsenic pollution and minimizing waste impact on the environment.

Graphical abstract