Sulfur enrichment of atmospheric minerals and spores

Atmospheric particles were analysed by electron microscopy to obtain direct evidence for S-enrichment in minerals and spores in the 0.5 to 10-μm diameter range. The particles were collected at Research Triangle Park, NC, U.S.A. for 2 weeks during summer 1988, using dichtomous samplers that were modi...

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Bibliographic Details
Published in:Atmospheric environment 1992, Vol.26 (6), p.1113-1120
Main Authors: Mamane, Yaacov, Dzubay, Thomas G., Ward, Rachel
Format: Article
Language:English
Subjects:
annular denuder
Applied sciences
Atmospheric pollution
coarse particles
dichotomous samplers
electron microscopy
Exact sciences and technology
fine particles
Minerals
Pollutants physicochemistry study: properties, effects, reactions, transport and distribution
Pollution
spores
sulfur
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Summary:Atmospheric particles were analysed by electron microscopy to obtain direct evidence for S-enrichment in minerals and spores in the 0.5 to 10-μm diameter range. The particles were collected at Research Triangle Park, NC, U.S.A. for 2 weeks during summer 1988, using dichtomous samplers that were modified for use with electron microscopy. One of the samplers was equipped with an annular denuder that removed acidic gases upstream of the filters to avoid artifact reactions on the filter between gases and particles. A comparison of X-ray spectra for atmospheric particles and locally collected soil and mushroom spores revealed significant S-enrichment of atmospheric silicates and spores. It was concluded that the S-enrichments were caused by atmospheric reactions and not by sampling artifact.
ISSN:0960-1686
0004-6981
DOI:10.1016/0960-1686(92)90043-K