A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Influences of sulfate and nitrate on the hygroscopic behaviour of coarse dust particles
AbstractAsian dust particles of diameter >1μm 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.
Influences of sulfate and nitrate on the hygroscopic behaviour of coarse dust particles
AbstractAsian dust particles of diameter >1μm 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.
Influences of sulfate and nitrate on the hygroscopic behaviour of coarse dust particles
Shi, Zongbo (author) / Zhang, Daizhou (author) / Hayashi, Masahiko (author) / Ogata, Hiroko (author) / Ji, Hezhe (author) / Fujiie, Wataru (author)
Atmospheric Environment ; 42 ; 822-827
2007-10-24
6 pages
Article (Journal)
Electronic Resource
English
Solutions of hygroscopic salts to lay the dust
| Engineering Index Backfile | 1927
Hygroscopic and mechanical behaviour of earth bricks
| Springer Verlag | 2021