Hydrophobic deep eutectic solvents as extraction agents of nitrophenolic pollutants from aqueous systems

Nitrophenolic compounds are hazardous substances, listed as priority pollutants by World Health Organization, due to their toxicity on both the environment and human health. They used in agriculture insecticides fungicides they can contaminate water reserves filtering through soil into groundwater. Therefore, these substances must be removed from agricultural wastewater before being discharged. In this work, several Deep Eutectic Solvents, based menthol, thymol organic acid, separation agents liquid–liquid extraction remove 2-nitrophenol 4-nitrophenol water. The optimal conditions were studied better yields obtained using: (1:1) V DES :V W ratio 30 min of stirring time. All experiments carried out at 298.15 K centrifugation time 6000 rpm. As results show, deep eutectic solvents menthol extract nitrophenolic compounds, while those only applied for removal 4-nitrophenol. present high efficiencies, over 90%, assuring capability aqueous systems. • Liquid–liquid technique was nitrophenols Menthol thymol-based agents. satisfactorily achieved with all solvents. Increasing proportion enhances