Factors Controlling the Variation of Aerosol Surface Area Concentrations Measured by a Diffusion Charger in Fukuoka, Japan
| Autor: | Tomoaki Okuda, Akinori Takami, Kazuki Hatoya, Chiharu Nishita, Ayako Yoshino, Hana Yamazaki, Keiichiro Hara, Naoki Kaneyasu, Kozo Inoue, Koji Funato, Masahiko Hayashi |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Atmospheric Science
010504 meteorology & atmospheric sciences Diffusion Diurnal temperature variation Mineralogy Carbon black 010501 environmental sciences Environmental Science (miscellaneous) respiratory system aerosol mass spectrometer (AMS) black carbon (BC) diffusion charging nanoparticle surface area monitor (NSAM) PM2.5 volcanic emission 01 natural sciences complex mixtures Aerosol chemistry.chemical_compound chemistry Nitrate Environmental chemistry Environmental science Sulfate aerosol Sulfate Chemical composition 0105 earth and related environmental sciences |
| Zdroj: | Atmosphere; Volume 7; Issue 3; Pages: 33 |
| ISSN: | 2073-4433 |
| DOI: | 10.3390/atmos7030033 |
| Popis: | The surface area of ambient aerosols can be considered as an index of toxicity because an increased surface area may be able to act as a catalyst for specific reactions between particles and cells, as well as a carrier for co-pollutants, such as gases and chemicals. The aerosol surface area concentration was measured together with black carbon (BC) and other chemical species such as organic compounds, sulfate, and nitrate in Fukuoka, Japan, and the effect of the chemical composition of aerosols on their surface area was investigated. Aerosol surface area concentration was highly correlated with BC concentration for the entire period. Day-of-week variation and diurnal variation also showed the strong correlation between aerosol surface area and BC. This implies that even though BC accounts for relatively small percentage (in this study, 3.5%) of PM2.5 mass, it should receive considerable attention when aerosol surface area is considered as an index of adverse health effects caused by exposure of the human body to aerosols. Sulfate aerosol does not usually affect aerosol surface area in Fukuoka, but it may occasionally have a significant effect when the airmass contains an excess amount of relatively smaller particles of sulfate derived from volcanic SO2. |
| Databáze: | OpenAIRE |
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