Treatment of hydroxy-naphthol blue, methylene blue, and trypan blue by electro Fenton process in aqueous solution with or without sparging air

The use of dyes in the textile industry poses significant environmental challenges, prompting a heightened focus on physical, chemical, and electrochemical processes for wastewater treatment. This research advocates for the remediation of methylene blue (MB), hydroxy naphthol blue (HNB), and trypan blue (TB) through the electro-Fenton (EF) procedure in aqueous media using iron anodes. To enhance the effectiveness of this technique, the integration of sparging air (SA) was introduced. In the EF process, the destruction of chemical oxygen demand (COD) for MB, TB, and HNB reached 89