Distributions of nitrated polycyclic aromatic hydrocarbons in the sediment of Osaka Bay, Japan

Seiichi Uno; Hiroyuki Tanaka; Emiko Kokushi; Eugene T Bacolod; Jiro Koyama

doi:10.1016/j.marpolbul.2017.02.062

Distributions of nitrated polycyclic aromatic hydrocarbons in the sediment of Osaka Bay, Japan

Mar Pollut Bull. 2017 Nov 30;124(2):1014-1019. doi: 10.1016/j.marpolbul.2017.02.062. Epub 2017 Mar 6.

Authors

Seiichi Uno¹, Hiroyuki Tanaka², Emiko Kokushi³, Eugene T Bacolod⁴, Jiro Koyama⁵

Affiliations

¹ Education and Research Center for Marine Resources and Environment, Fisheries, Kagoshima University, 50-20 Shimoarata 4-Chome, Kagoshima 890-0056, Japan. Electronic address: uno@fish.kagoshima-u.ac.jp.
² Environment Conservation Division, National Research Institute of Fisheries and Environment of Inland Sea, Hiroshima 739-0452, Japan. Electronic address: TANAKA_hiroyuki@affrc.go.jp.
³ Education and Research Center for Marine Resources and Environment, Fisheries, Kagoshima University, 50-20 Shimoarata 4-Chome, Kagoshima 890-0056, Japan. Electronic address: kokushi@fish.kagsohima-u.ac.jp.
⁴ Department of Chemistry, School of Arts and Sciences, University of San Carlos, 6000 Cebu City, Philippines.
⁵ Education and Research Center for Marine Resources and Environment, Fisheries, Kagoshima University, 50-20 Shimoarata 4-Chome, Kagoshima 890-0056, Japan. Electronic address: koyama@fish.kagoshima-u.ac.jp.

PMID: 28270320
DOI: 10.1016/j.marpolbul.2017.02.062

Abstract

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.

Keywords: Exhaust gas; Nitroarenes; Osaka Bay; PAHs; Sediments.

MeSH terms

Bays
Environmental Monitoring*
Geologic Sediments / chemistry*
Japan
Nitrates / analysis
Polycyclic Aromatic Hydrocarbons / analysis*
Polycyclic Aromatic Hydrocarbons / chemistry
Soil Pollutants / analysis*
Vehicle Emissions
Water Pollutants, Chemical / analysis*

Substances

Nitrates
Polycyclic Aromatic Hydrocarbons
Soil Pollutants
Vehicle Emissions
Water Pollutants, Chemical