Vertical profile of polycyclic aromatic hydrocarbons in a sediment core from a reservoir in Osaka City |
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| Authors: | Miho Ishitake Hiroshi Moriwaki Kenshi Katahira Osamu Yamamoto Kenshiro Tsuruho Hideo Yamazaki Shusaku Yoshikawa |
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| Institution: | (1) Department of Biology and Geosciences, Graduate School of Science, Osaka City University, 3-3-138, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan;(2) Osaka City Institute of Public Health and Environmental Sciences, 8-34 Tojo-cho, Tennouji-ku, Osaka 543-0026, Japan;(3) Department of Life Science, School of Science and Engineering, Kinki University, 3-4-1 Kowakae, Higashi-Osaka 577-8502, Japan |
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| Abstract: | Concentrations of polycyclic aromatic hydrocarbons (PAHs) were measured in a dated sediment core from a reservoir at Osaka
City, Southwest Japan. The sediment core consisted of deposits collected over a period of almost 70 years whose PAH content
would serve as a historical record of atmospheric environment at Osaka City. Total PAH concentrations varied from 4.2 to 26 mg kg−1 dry wt, and peaked in the 1940s, reflecting the occurrence of a large fire due to air attacks during World War II. The results
indicated that warfare had the largest impact on atmospheric environment in Osaka City. Total PAH concentrations decreased
in the post-war period except for a small peak. In the 1950s, there was a downward trend from the 1970s to the present. These
trends can be ascribed to the growth of industrial activities and the regulation of atmospheric pollutant emissions, respectively. |
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| Keywords: | Polycyclic aromatic hydrocarbons Reservoir sediment Osaka City World War II Climatology |
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