Seiichi Uno, Hiroyuki Tanaka, Emiko Kokushi, Eugene T. Bacolod, Jiro Koyama
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 1949 ng/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. © 2017 Elsevier Ltd
Education and Research Center for Marine Resources and Environment, Fisheries, Kagoshima University, 50-20 Shimoarata 4-Chome, Kagoshima, 890-0056, Japan; Environment Conservation Division, National Research Institute of Fisheries and Environment of Inland Sea, Hiroshima, 739-0452, Japan; Department of Chemistry, School of Arts and Sciences, University of San Carlos, Cebu City, 6000, Philippines
