DOI: 10.1016/j.atmosres.2017.11.014
Scopus记录号: 2-s2.0-85037337203
论文题名: Spatial and temporal characteristics of PM2.5 acidity during autumn in marine and coastal area of Bohai Sea, China, based on two-site contrast
作者: Zhou M. ; Zhang Y. ; Han Y. ; Wu J. ; Du X. ; Xu H. ; Feng Y. ; Han S.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2018
卷: 202 起始页码: 196
结束页码: 204
语种: 英语
英文关键词: Acidity
; Coast
; Marine
; Nitrate formation
; PM2.5
; Spatial and temporal variation
Scopus关键词: Aerosols
; Atmospheric humidity
; Chromatography
; Coastal zones
; Ion chromatography
; Ions
; Mixtures
; Nitrates
; Nitrogen compounds
; Atmospheric particulate
; Marine
; Meteorological parameters
; PM2.5
; Spatial and temporal variation
; Temperature and relative humidity
; Temporal characteristics
; Water-soluble ions
; Acidity
; acidity
; autumn
; coastal zone
; marine environment
; nitrate
; particulate matter
; spatial variation
; temporal variation
; Bohai Sea
; China
; Pacific Ocean
; Yellow Sea
英文摘要: In-situ pH of atmospheric particulate, defined as the pH value of aqueous phase in ambient aerosol, has been reported to have significant influence on the formation progress of secondary aerosol, especially through the heterogeneous pathway. In this study, PM2.5 samples were collected in the marine and costal area of Bohai Sea from September 8th to October 8th in 2013, with daytime and nighttime separated. Eight water-soluble ions including SO4 2 −, NO3 −, Cl−, NH4 +, K+, Ca2 +, Na+ and Mg2 + were analyzed by ion chromatography. The in-situ pH of PM2.5 was estimated using Aerosol Inorganics Model II, with meteorological parameters (temperature and relative humidity) and basic chemical composition data (concentrations of water-soluble ions) serving as input. Five indicators were conjunctively applied to describe the spatial and temporal characteristics of PM2.5 acidity over Bohai Sea during autumn. As a result, strong acidity was found in both marine and coastal area. Marine area had a stronger acidity under a more NH4 +-deficiency and humid condition. And the difference of PM2.5 acidity between daytime and nighttime was more obvious in coastal area than that in marine area, with stronger acidity observed during the daytime. Local SO2 emission was identified as an important factor influencing the diurnal variation of aerosol acidity. Meanwhile, sulfurous species were identified as a mixture of NH4HSO4 and H2SO4 in marine area while a mixture of NH4HSO4 and (NH4)2SO4 in the coastal area. Analysis in the impact of aerosol acidity on nitrate formation has indicated that heterogeneous pathways were important in nitrate formation in coastal area of Bohai Sea as well as the homogeneous pathways. Capsule abstract PM2.5 was highly acidic around Bohai Sea, and the acidity of PM2.5 was stronger in marine area than coastal area during autumn. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/108969
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
There are no files associated with this item.
作者单位: State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, China; Tianjin Institute of Meteorological Science, Tianjin, 300074, China
Recommended Citation:
Zhou M.,Zhang Y.,Han Y.,et al. Spatial and temporal characteristics of PM2.5 acidity during autumn in marine and coastal area of Bohai Sea, China, based on two-site contrast[J]. Atmospheric Research,2018-01-01,202