Novel AOPs-Based Dual-Environmental Digestion Method for Determination of Total Dissolved Nitrogen in Water

Based on a synergistic digestion method of ultraviolet combined with ozone (UV/O3), this article investigates the reaction characteristics nitrogen-containing compounds (N-compounds) in water and influence ions efficiency. In respect, novel efficient AOPs-based dual-environmental for determination total dissolved nitrogen (TDN) waters complex components is proposed, hopes improving detection efficiency accuracy via online monitoring. The results show that inorganic organic N-compounds have higher conversion rates alkaline acidic conditions, respectively. Meanwhile, experimental Cl?, CO32?, HCO3? process indicate Cl? can convert to radical reactive halogen species (RHS) order promote efficiency, but CO32? cause cyclic consuming numerous •OH, weakening Ultimately, verify effectiveness method, samples containing ammonium chloride, urea, glycine different proportions were digested under optimal conditions: flow rate, 0.6 L/min; temperature, 40 °C; pH 2; time condition, 10 min; 11; min. rate (CR) varied from 93.23% 98.64%; mean CR was greater than 95.30%. This represents potential alternative routine analysis or monitoring quality.