Trends and factors governing polycyclic aromatic hydrocarbon levels in Tokyo Bay sediments

Details Trends and factors governing polycyclic aromatic hydrocarbon levels in Tokyo Bay sediments Trends and factors governing polycyclic aromatic hydrocarbon levels in Tokyo Bay sediments

Sep 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983gecoa..47.1651o&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 47, Issue 9, pp.1651-1654

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Scientific paper

Polycyclic aromatic hydrocarbons (PAHs) in a dated sediment core from Tokyo Bay were determined by gas chromatography and GC/MS. These PAHs increase in concentration from the 1950's to the beginning of the 1970's and decrease after then. These changes, especially the decreasing trend, are discussed with respect to changes in the atmospheric paniculate concentration and fossil fuel consumption in Tokyo and districts. The results suggest that the increase in PAH concentrations was due to the increase in the fossil fuel consumption, and the decreasing trend was caused by the following factors: 1. 1) less fuel oil consumption; 2. 2) legal curbs on industrial and vehicular emissions of particulates and hydrocarbons; and 3. 3) other factors such as a gradual decrease in consumption of heavy oil and a temporary drop in the use of asphalt.

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