Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Differences of chemical species and their ratios between fine and ultrafine particles in the roadside environment
Abstract Chemical components of fine particles (FPs; aerodynamic diameter, Dp < 2.5 μm) and ultrafine particles (UFPs; Dp < 0.1 μm) at Japanese and German roadsides were investigated during summer. The UFPs/FPs ratio for organic carbon (OC) concentrations on weekdays was 34.5% and 25.0% at Japanese and German roadsides, respectively, whereas 3.3% and 6.4% for elemental carbon (EC) concentrations, respectively. These results thus indicate a higher OC and a lower EC contribution from UFPs at the Japanese roadside than at the German roadside. In particle samples, OC2 and OC3 constituted a high proportion of UFPs, and pyrolyzed OC and EC1 were predominant among FPs of 0.1 μm < Dp < 2.5 μm. Our results showed roadside environment exist not only primary FPs and UFPs but also secondary FPs and UFPs from photochemical reactions or long-range transport.
Highlights ► OC2 and OC3 constitute a high proportion of UFPs. ► POC and EC1 were dominant among of FPs 0.1 < Dp < 2.5 μm. ► EC2 contributed to the total EC of UFPs in roadside environment. ► Higher minimum OC/EC ratio of UFP is affected by secondary or background particles.
Differences of chemical species and their ratios between fine and ultrafine particles in the roadside environment
Abstract Chemical components of fine particles (FPs; aerodynamic diameter, Dp < 2.5 μm) and ultrafine particles (UFPs; Dp < 0.1 μm) at Japanese and German roadsides were investigated during summer. The UFPs/FPs ratio for organic carbon (OC) concentrations on weekdays was 34.5% and 25.0% at Japanese and German roadsides, respectively, whereas 3.3% and 6.4% for elemental carbon (EC) concentrations, respectively. These results thus indicate a higher OC and a lower EC contribution from UFPs at the Japanese roadside than at the German roadside. In particle samples, OC2 and OC3 constituted a high proportion of UFPs, and pyrolyzed OC and EC1 were predominant among FPs of 0.1 μm < Dp < 2.5 μm. Our results showed roadside environment exist not only primary FPs and UFPs but also secondary FPs and UFPs from photochemical reactions or long-range transport.
Highlights ► OC2 and OC3 constitute a high proportion of UFPs. ► POC and EC1 were dominant among of FPs 0.1 < Dp < 2.5 μm. ► EC2 contributed to the total EC of UFPs in roadside environment. ► Higher minimum OC/EC ratio of UFP is affected by secondary or background particles.
Differences of chemical species and their ratios between fine and ultrafine particles in the roadside environment
Kudo, Shinji (Autor:in) / Sekiguchi, Kazuhiko (Autor:in) / Kim, Kyung Hwan (Autor:in) / Kinoshita, Masatoshi (Autor:in) / Möller, Detlev (Autor:in) / Wang, Qingyue (Autor:in) / Yoshikado, Hiroshi (Autor:in) / Sakamoto, Kazuhiko (Autor:in)
Atmospheric Environment ; 62 ; 172-179
15.08.2012
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Fine particles , Ultrafine particles , Roadside environment , Organic carbon/elemental carbon ratio , FP , fine particle , UFP , ultrafine particle , EC , elemental carbon , OC , organic carbon , MOUDI , micro-orifice uniform deposit impactors , INF , inertial filter , SOA , secondary organic aerosol , IGAFA , Joint Initiative of Non-university Research Institutions in Adlershof , BTU , Brandenburg Technical University , UV , ultraviolet , JST , Japan standard time , GST , German standard time , IMPROVE , interagency monitoring of protected visual environments , POC , pyrolyzed OC , WSOC , water-soluble OC , WIOC , water-insoluble OC
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