DOI: 10.1016/j.atmosenv.2014.09.006
Scopus记录号: 2-s2.0-84907074971
论文题名: Qualitative and quantitative assessment of unresolved complex mixture in PM2.5 of Bakersfield, CA
作者: Nallathamby P ; D ; , Lewandowski M ; , Jaoui M ; , Offenberg J ; H ; , Kleindienst T ; E ; , Rubitschun C ; , Surratt J ; D ; , Usenko S ; , Sheesley R ; J
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 98 起始页码: 368
结束页码: 375
语种: 英语
英文关键词: PM2.5
; Semi-volatile organic carbon
; Southern California
; Traffic emissions
Scopus关键词: Qualitative and quantitative assessments
; Southern California
; Traffic emissions
; Unresolved complex mixtures
; alkane
; alkene
; alkyne
; volatile agent
; carbon
; field survey
; mass
; organic carbon
; particulate matter
; retention
; traffic emission
; vapor pressure
; agricultural parameters
; Article
; concentration (parameters)
; construction work
; exhaust gas
; motor vehicle
; particulate matter
; physical chemistry
; qualitative analysis
; quantitative analysis
; trend study
; vapor pressure
; Bakersfield
; California
; California
; United States
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: The 2010 CalNex (California Nexus) field experiment offered an opportunity for detailed characterization of atmospheric particulate carbon composition and sources in Bakersfield, CA. In the current study, the authors describe and employ a new protocol for reporting unresolved complex mixture (UCM) in over 30 daily samples. The Bakersfield, CA site has significant contribution from UCM, 2.9 ± 2.2% of the daily OC, which makes it an ideal first application. The new protocol reports two UCM peaks for Bakersfield with unique mean vapor pressure, retention time, mass spectra and daily ambient concentration trends. The first UCM peak, UCM-A, was comprised of semi-volatile compounds including alkanes, alkenes, and alkynes, with a mean vapor pressure of 2E-04 Torr and medium to heavy-duty diesel exhaust as a likely source. The second UCM peak, UCM-B, was comprised of linear, branched, and cyclic alkanes, with a mean vapor pressure of 1E-08 Torr. UCM-B had strong similarities to UCM in the NIST Standard Reference Material 1649b (urban dust) and to previously reported, detailed UCM for a representative Bakersfield sample, with possible sources including: motor vehicle exhaust, agricultural activities, and construction activities. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80626
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Environmental Science, Baylor University, Waco, TX, United States; National Exposure Research Laboratory, U.S. EPA, Research Triangle Park, NC, United States; Alion Science and Technology, Research Triangle Park, NC, United States; Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, United States
Recommended Citation:
Nallathamby P,D,, Lewandowski M,et al. Qualitative and quantitative assessment of unresolved complex mixture in PM2.5 of Bakersfield, CA[J]. Atmospheric Environment,2014-01-01,98