Assessing the steady-state [*NO2] in environmental samples. Implication for aromatic photonitration processes induced by nitrate and nitrite.
Based on available literature data of [NO2-], steady-state [*OH], and *OH generation rate upon nitrate photolysis in environmental aqueous samples under sunlight, the steady-state [*NO2], could be calculated. Interestingly, one to two orders of magnitude more *NO2 would be formed in photochemical processes in atmospheric water droplets compared to transfer from the gas phase. The relative importance of nitrite oxidation compared to nitrate photolysis as an *NO2 source would be higher in atmospheric than in surface waters. The calculated levels of *NO2 could lead to substantial transformation of phenol into nitrophenols in both atmospheric and surface waters.
Dipartimento di Chimica Analitica, Università di Torino, Via Pietro Giuria 5, 10125 Torino, Italy.
Claudio
C
Minero
Valter
V
Maurino
Ezio
E
Pelizzetti
Davide
D
Vione
D000393:Air Pollutants / Q000737:chemistry*; D001272:Atmosphere; D006801:Humans; D009573:Nitrites / Q000737:chemistry*; D010084:Oxidation-Reduction; D010636:Phenols / Q000737:chemistry*; D013472:Sunlight
D000393:Air Pollutants; D009573:Nitrites; D010636:Phenols