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<p>In the present work, the capacity of the Galvano-Fenton process as an advanced technique in terms of the simultaneous oxidation of the model pollutant (Direct Blue 14) and the energy production and saving is evaluated. The Galvano-Fenton technique utilises electrochemical oxidation to generate hydroxyl radicals, which efficiently degrade synthetic dyes while promoting energy recovery. The experiments were conducted in a galvanic system using standard steel as a sacrificial anode, copper as a cathode and a 10&#xa0;mg/L DB14 aqueous solution with a pH of 3 (Pourbaix diagram) as a reaction medium. In this study, we investigated the influence of certain operational parameters—the pre-immersion time, the cathode surface and purity, the presence of catalysts, namely cerium oxide nanoparticles and titanium dioxide, and the electrolyte nature. The obtained results revealed a total (100%) degradation of the organic dye, an 85.55% COD removal, and a generated power density of 333.062 mW/m for a pre-immersion time of 5&#xa0;min, a cathode purity of 99.55% and a surface area of 5&#xa0;cm². The usage of cerium oxide nanoparticles and titanium dioxide as catalysts shows an inhibitory effect, protecting the sacrificial anode (standard steel electrode) from galvanic corrosion, thereby reducing the performance of the Galvanic Fenton system. Furthermore, the nature of the electrolyte demonstrated a notable influence on the performance of the GF system. The presence of various ions, including sodium, chloride, sulphate, potassium, magnesium, calcium, bromide, and bicarbonate, resulted in the inhibition of dye degradation and an increase in the generated power density, achieving a value of 20.073&#xa0;W/m² for NaCl electrolyte and nearly 30&#xa0;W/m² for seawater electrolyte. In conclusion, this study emphasises the significant potential of the Galvano-Fenton process, both for wastewater treatment and for the generation of clean, sustainable energy.</p>

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A Dual-Purpose Approach To Wastewater Treatment: Investigating DB14 Degradation and Power Generation Via the Galvano-Fenton Process

  • 期刊论文

  • 发表日期：

    2026年2月11日

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  • Manel Dridi,
  • Attef Daas,
  • Youcef Hamlaoui,
  • Aissa Dehane,
  • Slimane Merouani

摘要

In the present work, the capacity of the Galvano-Fenton process as an advanced technique in terms of the simultaneous oxidation of the model pollutant (Direct Blue 14) and the energy production and saving is evaluated. The Galvano-Fenton technique utilises electrochemical oxidation to generate hydroxyl radicals, which efficiently degrade synthetic dyes while promoting energy recovery. The experiments were conducted in a galvanic system using standard steel as a sacrificial anode, copper as a cathode and a 10 mg/L DB14 aqueous solution with a pH of 3 (Pourbaix diagram) as a reaction medium. In this study, we investigated the influence of certain operational parameters—the pre-immersion time, the cathode surface and purity, the presence of catalysts, namely cerium oxide nanoparticles and titanium dioxide, and the electrolyte nature. The obtained results revealed a total (100%) degradation of the organic dye, an 85.55% COD removal, and a generated power density of 333.062 mW/m for a pre-immersion time of 5 min, a cathode purity of 99.55% and a surface area of 5 cm². The usage of cerium oxide nanoparticles and titanium dioxide as catalysts shows an inhibitory effect, protecting the sacrificial anode (standard steel electrode) from galvanic corrosion, thereby reducing the performance of the Galvanic Fenton system. Furthermore, the nature of the electrolyte demonstrated a notable influence on the performance of the GF system. The presence of various ions, including sodium, chloride, sulphate, potassium, magnesium, calcium, bromide, and bicarbonate, resulted in the inhibition of dye degradation and an increase in the generated power density, achieving a value of 20.073 W/m² for NaCl electrolyte and nearly 30 W/m² for seawater electrolyte. In conclusion, this study emphasises the significant potential of the Galvano-Fenton process, both for wastewater treatment and for the generation of clean, sustainable energy.