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Sulfur Isotope Ratios of Coals and Oils Used in China and Japan

Takao MARUYAMA^†, Tsuyoshi OHIZUMI^*, Yutaka TANEOKA, Naoki MINAMI^††, Norio FUKUZAKI^†††, Hitoshi MUKAI^††††, Kentaro MURANO^†††† and Minoru KUSAKABE^{†††††}

Niigata Prefectural Research Laboratory for Health and Environment; Sowa, Niigata-shi 950-2144 Japan

^† Present address: Niigata Prefectural Joetsu Public Health Center; Kasugayama, Joetsu-shi 943-0807 Japan

^†† Present address: Niigata Prefectural Government, Fire Prevention and EmergencyManagement Division; Shinko-cho, Niigata-shi 950-8570 Japan

^††† Present address: Acid Deposition and Oxidant Research Center; Sowa, Niigata-shi 950-2144 Japan

^†††† National Institute for Environmental Studies; Onogawa, Tsukuba-shi 305-0053 Japan

^{†††††} Institute for Study of the Earth's Interior, Okayama University; Misasa, Tottori 682-0193 Japan

Sulfur isotope ratio(δ ³⁴S) was measured for coals and oils used in northern China, eastern Russia and Japan. The δ ³⁴S values of northern Chinese coals and Russian coals are 7.7}11.4ñ (about 5 ñ in median) and 4.5}4.8ñ in average, which are higher than those reported for coals in southern China. This suggests the difference of coal forming processes between northern China, eastern Russia and southern China. Oils(main fuel in Japan) show low δ ³⁴S values that are very different from those of Chinese and Russian coals. These differences in sulfur isotope ratios are reflected to the seasonal variation of sulfur isotope ratios of rain and aerosol in the Japan Sea side of Japan.

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