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Nitrate formation mechanisms causing high concentration of PM2.5 in a residential city with low anthropogenic emissions during cold season.
Jeon, Ji-Won; Park, Sung-Won; Han, Young-Ji; Lee, Taehyoung; Lee, Seung-Ha; Park, Jung-Min; Yoo, Myung-Soo; Shin, Hye-Jung; Hopke, Philip K.
Afiliación
  • Jeon JW; Dept. of Environmental Science, Kangwon National University, Chuncheon, Gangwon-do, 24341, Republic of Korea.
  • Park SW; Dept. of Environmental Science, Kangwon National University, Chuncheon, Gangwon-do, 24341, Republic of Korea.
  • Han YJ; Dept. of Environmental Science, Kangwon National University, Chuncheon, Gangwon-do, 24341, Republic of Korea; Gangwon particle pollution research and management center, Kangwon National University, Chuncheon, Gangwon-do, 24341, Republic of Korea. Electronic address: youngji@kangwon.ac.kr.
  • Lee T; Dept. of Environmental Science, Hankuk University of Foreign Studies, Yongin, 17035, Republic of Korea.
  • Lee SH; Air quality research division, National Institute of Environmental Research, Incheon, 22689, Republic of Korea.
  • Park JM; Air quality research division, National Institute of Environmental Research, Incheon, 22689, Republic of Korea.
  • Yoo MS; Air quality research division, National Institute of Environmental Research, Incheon, 22689, Republic of Korea.
  • Shin HJ; Air quality research division, National Institute of Environmental Research, Incheon, 22689, Republic of Korea.
  • Hopke PK; Institute for a Sustainable Environment, Clarkson University, Potsdam, NY, 13699, USA; Dept. of Public Health Sciences, University of Rochester School of Medicine and Dentistry, Rochester, NY, 14642, USA.
Environ Pollut ; 352: 124141, 2024 Jul 01.
Article en En | MEDLINE | ID: mdl-38740243
ABSTRACT
During the cold season in South Korea, NO3- concentrations are known to significantly increase, often causing PM2.5 to exceed air quality standards. This study investigated the formation mechanisms of NO3- in a suburban area with low anthropogenic emissions. The average PM2.5 was 25.3 µg m-3, with NO3- identified as the largest contributor. Ammonium-rich conditions prevailed throughout the study period, coupled with low atmospheric temperature facilitating the transfer of gaseous HNO3 into the particulate phase. This result indicates that the formation of HNO3 played a crucial role in determining particulate NO3- concentration. Nocturnal increases in NO3- were observed alongside increasing ozone (O3) and relative humidity (RH), emphasizing the significance of heterogeneous reactions involving N2O5. NO3- concentrations at the study site were notably higher than in Seoul, the upwind metropolitan area, during a high concentration episode. This difference could potentially attributed to lower local NO concentrations, which enhanced the reaction between O3 and NO2, to produce NO3 radicals. High concentrations of Cl- and dust were also identified as contributors to the elevated NO3- concentrations.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Ozono / Estaciones del Año / Monitoreo del Ambiente / Ciudades / Contaminantes Atmosféricos / Material Particulado / Nitratos País/Región como asunto: Asia Idioma: En Revista: Environ Pollut Asunto de la revista: SAUDE AMBIENTAL Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Ozono / Estaciones del Año / Monitoreo del Ambiente / Ciudades / Contaminantes Atmosféricos / Material Particulado / Nitratos País/Región como asunto: Asia Idioma: En Revista: Environ Pollut Asunto de la revista: SAUDE AMBIENTAL Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido