Abstracts of Annual Meeting of the Geochemical Society of Japan
Abstracts of Annual Meeting of the Geochemical Society of Japan
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Host: Abstracts of Annual Meeting of the Geochemical Society of Japan

Chemical Composition and sulfur and oxygen isotope ratios of sulfate ion in water-soluble part of PM2.5 and SPM at Okayama city.
Tsubasa Yamamoto, *Hitoshi Chiba
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Keywords: Suspended particulate matter, Okayama, water soluble, sulfur isosotpe, oxygen isotope
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Pages 110-

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Abstract

Suspended particulate matters (SPM and PM2.5) were sampled at Okayama every month and their water-soluble chemistry and S and O isotope ratios of sulfate ion were measured. Major chemical composition of water-soluble component is (NH4)2SO4. Sulfur isotope ratios are high in winter and low in other season similar to sulfate ion in precipitation, though they are 1~2‰ lighter than those in precipitation. High sulfur isotope ratio in winter seems to be affected by coal combustion in continental China. Oxygen isotope ratio of SPM is high in spring.

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