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<p>Azo dyes such as Safranin are among the toxic and persistent organic pollutants that are difficult to decompose in nature and they can cause serious ecotoxic effects on water resources. In this context, photocatalytic treatment methods offer alternative solutions based on environmentally friendly, effective, and advanced oxidation processes. Waste foundry sand (WFS) has been considered as a potential photocatalyst due to its photocatalytic activity components such as TiO<sub>2</sub> and Fe<sub>2</sub>O<sub>3</sub>. The use of WFS in this process represents a sustainable approach both economically and environmentally. In this study, the photocatalytic properties of WFS were evaluated and its effectiveness in removing Safranin dye from aqueous media was investigated. The results showed that 95.59% safranin dye degradation was achieved under pH 8.50, 1.25&#xa0;g/L WFS amount, 10&#xa0;mg/L Safranin dye concentration and 60&#xa0;min reaction time. The findings show that WFS can be evaluated as a secondary resource and used as an effective material in photocatalytic treatment applications. In this respect, the study offers a holistic solution for both waste management and treatment of industrial wastewater.</p>

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Eco-Friendly Degradation of Safranin Azo Dye Using Waste Foundry Sand under UV Light

  • 期刊论文

  • 发表日期：

    2026年5月22日

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  • Pinar Belibagli,
  • Nihan Canan Ozdemir,
  • Mutlu Yalvac,
  • Hadj Daoud Bouras,
  • Nadir Dizge

摘要

Azo dyes such as Safranin are among the toxic and persistent organic pollutants that are difficult to decompose in nature and they can cause serious ecotoxic effects on water resources. In this context, photocatalytic treatment methods offer alternative solutions based on environmentally friendly, effective, and advanced oxidation processes. Waste foundry sand (WFS) has been considered as a potential photocatalyst due to its photocatalytic activity components such as TiO2 and Fe2O3. The use of WFS in this process represents a sustainable approach both economically and environmentally. In this study, the photocatalytic properties of WFS were evaluated and its effectiveness in removing Safranin dye from aqueous media was investigated. The results showed that 95.59% safranin dye degradation was achieved under pH 8.50, 1.25 g/L WFS amount, 10 mg/L Safranin dye concentration and 60 min reaction time. The findings show that WFS can be evaluated as a secondary resource and used as an effective material in photocatalytic treatment applications. In this respect, the study offers a holistic solution for both waste management and treatment of industrial wastewater.