Comparison of Atmospheric Nitropolycyclic Aromatic Hydrocarbons in Vladivostok, Kanazawa and Toyama.

Abstract

Airborne particulates were collected simultaneously at Vladivostok, Kanazawa and Toyama. 1,3-, 1,6-, 1,8-Dinitropyrenes (DNPs), 1-, 2-, 4-nitropyrenes (NPs), 2-nitrofluorene and 6-nitrochrysene in the particulates were analyzed by HPLC with chemiluminescence detection. All compounds were detected not only in Kanazawa but also in Vladivostok and Toyama. Moreover, five unknown peaks which might be nitropolycyclic aromatic hydrocarbons were detected only in chromatograms of Vladivostok. The [DNPs]/[1-NP] ratios at all stations were near the value found in diesel-exhaust particulates, suggesting that one of the main contributors of these compounds was dieselengine vehicles not only in Kanazawa and Toyama but also in Vladivostok. However, the difference in traffic volume at two stations in Vladivostok did not have a significant effect on the concentrations of DNPs and NPs in contrast to two stations in Kanazawa. These results suggested sources other than diesel-engine vehicles also contributing to DNPs and NPs in Vladivostok. Seasonal variations similar to those in Kanazawa were observed in Vladivostok and Toyama. As in Kanazawa, the [2-NP]/[1-NP] ratio in Vladivostok was larger at the lighter traffic station than that at heavier traffic station. This suggested that, as in Kanazawa, 2-NP was formed in the atmosphere in Vladivostok.

Polycyclic Aromatic Hydrocarbons in Surface Water of the Southeastern Japan Sea

“…[22][23][24][25] In the marine environment, other major sources of PAHs include oil spills from tankers and ballast water from ships. The sinking of the Russian Tanker "Nakhodka" in 1997 resulted in a spill of more than 7000 kL of heavy oil, which contained many kinds of PAHs, increasing the concentrations of PAHs in the southeastern Japan Sea.…”

Distribution and Source of Atmospheric Polycyclic Aromatic Hydrocarbons and Nitropolycyclic Aromatic Hydrocarbons in Tieling City, Liaoning Province, a Typical Local City in Northeast China

“…The time program of the fluorescence detector was set to detect at the optimum excitation and emission wavelengths for each PAH. Other conditions were the same as in our previous report (Tang et al, 2002a).…”

“…The solution was filtered with a 0.45 μm HLC-Disk membrane filter (Kanto Chemical Co., Inc., Tokyo, Japan), and an aliquot of this solution was injected into the HPLC system for NPAHs. Other conditions were the same as in our previous reports (Tang et al, 2002a;Hayakawa et al, 1991).…”

Environmental Behaviors and Toxicities of Polycyclic Aromatic Hydrocarbons and Nitropolycyclic Aromatic Hydrocarbons

“…Although there were a small difference in the order of cities, the PAH and NPAH concentrations in the four countries were in the order, China>Russia>Korea=Japan. It must be emphasized that the atmospheric PAH concentrations in China were much higher than those in Japan, suggesting that the urban atmosphere in China was very much polluted with PMcontaining PAHs [19][20][21][22][23] (Fig. 7).…”