Distributions of nitrated polycyclic aromatic hydrocarbons in the sediment of Osaka Bay, Japan
| Autor: | Emiko Kokushi, Hiroyuki Tanaka, Jiro Koyama, Seiichi Uno, Eugene T. Bacolod |
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| Rok vydání: | 2016 |
| Předmět: |
Geologic Sediments
Nitrates 010504 meteorology & atmospheric sciences Environmental engineering Exhaust gas Sediment 010501 environmental sciences Aquatic Science Oceanography 01 natural sciences Pollution Dry weight Bays Japan Environmental chemistry Environmental science Soil Pollutants Polycyclic Aromatic Hydrocarbons Bay Water Pollutants Chemical 0105 earth and related environmental sciences Environmental Monitoring Vehicle Emissions |
| Zdroj: | Marine pollution bulletin. 124(2) |
| ISSN: | 1879-3363 |
| Popis: | The distributions of 15 nitrated polycyclic aromatic hydrocarbons (NPAHs) in sediments collected at 44 sites throughout Osaka Bay, Japan were examined. The highest total NPAHs, with a concentration of 1949ng/kg dry weight, were detected near the city of Amagasaki. Some sites near the cities of Osaka, Kishiwada, sand Sakai registered ng/kg levels of NPAHs, but individual NPAH concentrations were relatively lower than those in previous studies. The sources were estimated using principal component analysis, and NPAHs were derived from exhaust gases of automobiles and industries at some sites. However, our results suggest that it is difficult to estimate the source, especially in coastal areas near big cities and large industrial areas, because the generation pathways between parent polycyclic aromatic hydrocarbons (PAHs) and nitrated PAHs are slightly different, and the ratio of PAHs and NPAHs could not be accurately reflect the characters of sources in sediments especially at coastal areas with large-scale industrial zones. |
| Databáze: | OpenAIRE |
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