Redox coupling induced by nitrite in the UV/sulfite system: Mechanisms and pathways of metformin degradation

Key Points

• Metformin degradation occurs via complex redox coupling pathways, influenced by nitrite.
• The study identifies several key mechanisms that facilitate the degradation process, including reactive intermediates.
• Analysis of the UV/sulfite system highlights how nitrite plays a crucial role in activating these pathways.
• Understanding these mechanisms may significantly enhance metformin elimination in wastewater treatment.