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Important yet Overlooked HONO Source from Aqueous-phase Photochemical Oxidation of Nitrophenols.
Yang, Wangjin; Ji, Hui; Li, Fu; He, Xue; Zhang, Shan; Nan, Xiangli; Du, Tao; Li, Kun; Han, Chong.
Afiliação
  • Yang W; School of Metallurgy, Northeastern University, Shenyang 110819, China.
  • Ji H; School of Metallurgy, Northeastern University, Shenyang 110819, China.
  • Li F; School of Metallurgy, Northeastern University, Shenyang 110819, China.
  • He X; School of Metallurgy, Northeastern University, Shenyang 110819, China.
  • Zhang S; Qingdao Key Laboratory for Prevention and Control of Atmospheric Pollution in Coastal Cities, Environment Research Institute, Shandong University, Qingdao 266237, China.
  • Nan X; School of Metallurgy, Northeastern University, Shenyang 110819, China.
  • Du T; School of Metallurgy, Northeastern University, Shenyang 110819, China.
  • Li K; Qingdao Key Laboratory for Prevention and Control of Atmospheric Pollution in Coastal Cities, Environment Research Institute, Shandong University, Qingdao 266237, China.
  • Han C; School of Metallurgy, Northeastern University, Shenyang 110819, China.
Environ Sci Technol ; 58(35): 15722-15731, 2024 Sep 03.
Article em En | MEDLINE | ID: mdl-39175437
ABSTRACT
Nitrites (NO2-/HONO), as the primary source of hydroxyl radicals (•OH) in the atmosphere, play a key role in atmospheric chemistry. However, the current understanding of the source of NO2-/HONO is insufficient and therefore hinders the accurate quantification of atmospheric oxidation capacity. Herein, we highlighted an overlooked HONO source by the reaction between nitrophenols (NPs) and •OH in the aqueous phase and provided kinetic data to better evaluate the contribution of this process to atmospheric HONO. Three typical NPs, including 4-nitrophenol (4NP), 2-nitrophenol (2NP), and 4-nitrocatechol (4NC), underwent a denitration process to form aqueous NO2- and gaseous HONO through the •OH oxidation, with the yield of NO2-/HONO varied from 15.0 to 33.5%. According to chemical composition and structure analysis, the reaction pathway, where the ipso addition of •OH to the NO2 group on 4NP generated hydroquinone, can contribute to more than 61.9% of the NO2-/HONO formation. The aqueous photooxidation of NPs may account for HONO in the atmosphere, depending on the specific conditions. The results clearly suggest that the photooxidation of NPs should be considered in the field observation and calculation to better evaluate the HONO budget in the atmosphere.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Oxirredução / Nitrofenóis Idioma: En Revista: Environ Sci Technol Ano de publicação: 2024 Tipo de documento: Article País de afiliação: China País de publicação: Estados Unidos
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Oxirredução / Nitrofenóis Idioma: En Revista: Environ Sci Technol Ano de publicação: 2024 Tipo de documento: Article País de afiliação: China País de publicação: Estados Unidos