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Seasonal variabilities in chemical compounds and acidity of aerosol particles at urban site in the west Pacific.
Pan, Xiaole; Uno, Itsushi; Wang, Zhe; Yamamoto, Shigekazu; Hara, Yukari; Wang, Zifa.
Afiliação
  • Pan X; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China. Electronic address: panxiaole@mail.iap.ac.cn.
  • Uno I; Research Institute for Applied Mechanics, Kyushu University, Kasuga, 816-8580, Japan.
  • Wang Z; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; Research Institute for Applied Mechanics, Kyushu University, Kasuga, 816-8580, Japan.
  • Yamamoto S; Fukuoka Institute of Health and Environmental Sciences, Dazaifu, 816-0135, Japan.
  • Hara Y; Research Institute for Applied Mechanics, Kyushu University, Kasuga, 816-8580, Japan.
  • Wang Z; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Environ Pollut ; 237: 868-877, 2018 Jun.
Article em En | MEDLINE | ID: mdl-29599060
Mass concentrations of chemical compounds in both PM2.5 (particle aerodynamic diameter, Dp < 2.5 µm) and PM2.5-10 (2.5 < Dp < 10 µm), and acidity of aerosol particles were measured at an urban site in western Japan using a continuous dichotomous Aerosol Chemical Speciation Analyzer (ACSA-12) throughout 2014. Mass concentrations of both PM2.5 and sulfate had distinct seasonal variabilities with maxima in spring and winter, mostly due to long-range transport with the prevailing westerly wind. Mass concentration of nitrate in PM2.5 (fNO3) showed an obvious warm-season-low and cold-season-high pattern as a result of both gas-aerosol phase equilibrium processes under high temperature conditions as well as transport. Nitrate in PM2.5-10 (cNO3) increased during long-range transport of dust, implying the great importance of heterogeneous processes at the surface of coarse mode particles. In this study, Δ[H+] (derived from the difference in pH of extract liquid with/without sampling) was used to indicate the acidity of particles. We found that acidity of particles in PM2.5 (fΔH) was mostly positive with a maximum in August because of the large fraction of nitrate and sulfate. Acidity of particles in PM2.5-10 (cΔH) was negative in winter and spring due to presence of alkaline matter from crustal sources. This study highlights the great importance of anthropogenic pollutants on the acidity of particles in the western Pacific Ocean and further impact on the marine environment and climate.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Monitoramento Ambiental / Aerossóis / Poluentes Atmosféricos / Poluição do Ar País/Região como assunto: Asia Idioma: En Revista: Environ Pollut Assunto da revista: SAUDE AMBIENTAL Ano de publicação: 2018 Tipo de documento: Article País de publicação: Reino Unido

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Monitoramento Ambiental / Aerossóis / Poluentes Atmosféricos / Poluição do Ar País/Região como assunto: Asia Idioma: En Revista: Environ Pollut Assunto da revista: SAUDE AMBIENTAL Ano de publicação: 2018 Tipo de documento: Article País de publicação: Reino Unido