Degradation of rhodamine B using a heterogeneous Fenton-like reaction driven by nano-zero-valent iron loaded on biochar prepared in the presence of ultrasonic irradiation

Key Points

• This research aims to explore the degradation of rhodamine B using a green catalytic system with nano-zero-valent iron (nZVI) and biochar.
• Generated nano-zero-valent iron particles using biochar and ultrasonic irradiation.
• Investigated the Fenton-like reaction for producing hydroxyl radicals and reducing Fe 3+ back to Fe 2+.
• Analyzed the degradation efficiency of rhodamine B under varying conditions.
• Confirmed the generation of hydroxyl radicals through the reaction of Fe 2+ and H2O2.
• Showed that the nZVI effectively catalyzed the degradation process.
• Monitored the reduction of Fe 3+ to Fe 2+ in the presence of dissolved oxygen.