Seasonal Fluctuation of Water Soluble Components in the Atmospheric Aerosol collected at Miho Peninsula in Shizuoka Prefecture, Japan.

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Atmospheric aerosol were collected by a low volume sampler for one and half a year during the period of 1997-1998 at the Miho Peninsula station in Shizuoka prefecture, Japan. A number of factories are located to the north and west of the sampling station. The station faces the sea in the south and the east directions. NH+4, Cl- NO-3, SO2-4 Na, Mg, Al, K, Ca, V, Fe, Cu, Zn and Pb in the samples were determined by an ion chromatograph and an ICP/AES. A comparison of the average concentration of those components in the samples with the average of 16 national stations in Japan showed that the atmospheric aerosol at Miho station contains higher concentrations of Na and V than the averages. Furthermore, various heavy elements in the sample showed high percentages of the water soluble fraction, such as Ca (97%), Na (96%), K (88%), V (86%), Zn (85%), Mg (83%), Pb (60%), Cu (53%), Fe (13%) and Al (12%) . The concentrations of water soluble fractions of V, Zn and Pb were found to increase when the wind came from the north. This suggests that those metals in the atmospheric aerosol come from anthropogenic activities. The water soluble Zn and Pb showed clear correlation with the monthly fluctuation of NH-4 and NO-3. The water soluble V did not correlate with other elements, suggesting a independent nature of a source of V from those of Zn and Pb.
日本環境化学会の論文