Abstract
Asian dust particles of diameter >1 μm collected in southwestern Japan were analyzed with environmental scanning electron microscopy. The hygroscopic behaviour of sea salt-free dust particles were investigated with respect to their contents of sulfate and nitrate. Sulfate- and nitrate-free dust particles (not containing sulfur and nitrogen), as well as sulfate-containing ones, did not change in their crystalline morphology as relative humidity (RH) was increased from 15% to 90%. In contrast, calcium nitrate-containing dust particles appeared in aqueous phase even at 15% RH. These results indicate that nitrate formation on coarse dust particles could substantially enhance the hydrophilicity of the particles and possibly vice versa, whereas sulfate formation could not.
| Original language | English |
|---|---|
| Pages (from-to) | 822-827 |
| Number of pages | 6 |
| Journal | Atmospheric Environment |
| Volume | 42 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2008 Feb |
| Externally published | Yes |
Fingerprint
Keywords
- Asian dust
- Calcium nitrate
- Gypsum
- Heterogeneous chemistry
- Hygroscopicity
- Mineral aerosol
ASJC Scopus subject areas
- Atmospheric Science
- Environmental Science(all)
- Pollution
Cite this
Influences of sulfate and nitrate on the hygroscopic behaviour of coarse dust particles. / Shi, Zongbo; Zhang, Daizhou; Hayashi, Masahiko; Ogata, Hiroko; Ji, Hezhe; Fujiie, Wataru.
In: Atmospheric Environment, Vol. 42, No. 4, 02.2008, p. 822-827.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Influences of sulfate and nitrate on the hygroscopic behaviour of coarse dust particles
AU - Shi, Zongbo
AU - Zhang, Daizhou
AU - Hayashi, Masahiko
AU - Ogata, Hiroko
AU - Ji, Hezhe
AU - Fujiie, Wataru
PY - 2008/2
Y1 - 2008/2
N2 - Asian dust particles of diameter >1 μm collected in southwestern Japan were analyzed with environmental scanning electron microscopy. The hygroscopic behaviour of sea salt-free dust particles were investigated with respect to their contents of sulfate and nitrate. Sulfate- and nitrate-free dust particles (not containing sulfur and nitrogen), as well as sulfate-containing ones, did not change in their crystalline morphology as relative humidity (RH) was increased from 15% to 90%. In contrast, calcium nitrate-containing dust particles appeared in aqueous phase even at 15% RH. These results indicate that nitrate formation on coarse dust particles could substantially enhance the hydrophilicity of the particles and possibly vice versa, whereas sulfate formation could not.
AB - Asian dust particles of diameter >1 μm collected in southwestern Japan were analyzed with environmental scanning electron microscopy. The hygroscopic behaviour of sea salt-free dust particles were investigated with respect to their contents of sulfate and nitrate. Sulfate- and nitrate-free dust particles (not containing sulfur and nitrogen), as well as sulfate-containing ones, did not change in their crystalline morphology as relative humidity (RH) was increased from 15% to 90%. In contrast, calcium nitrate-containing dust particles appeared in aqueous phase even at 15% RH. These results indicate that nitrate formation on coarse dust particles could substantially enhance the hydrophilicity of the particles and possibly vice versa, whereas sulfate formation could not.
KW - Asian dust
KW - Calcium nitrate
KW - Gypsum
KW - Heterogeneous chemistry
KW - Hygroscopicity
KW - Mineral aerosol
UR - http://www.scopus.com/inward/record.url?scp=38649142134&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=38649142134&partnerID=8YFLogxK
U2 - 10.1016/j.atmosenv.2007.10.037
DO - 10.1016/j.atmosenv.2007.10.037
M3 - Article
AN - SCOPUS:38649142134
VL - 42
SP - 822
EP - 827
JO - Atmospheric Environment
JF - Atmospheric Environment
SN - 1352-2310
IS - 4
ER -