潮間帯から発生する硫化水素量 [in Japanese] Amount of hydrogen sulfide released from tidal flats [in Japanese]
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Direct measurements of hydrogen sulfide released from tidal flats were made on six diverse seashores of Mikawa Bay, Japan, from November 1979 to October 1980. The concentration has been determined in situ by sulfide-ion electrode method, with a detectability to be approximately 0.1 μ mol/1 (0.1μ mol H<sub>2</sub>S/m<sup>2</sup>/hr). The hydrogen sulfide emission rates are detected to be only about 1 to 2 μ mol H<sub>2</sub>S/ m<sup>2</sup>/hr at organic-rich, black and muddy tidal flats, except one site, and less than 0.1 μ mol H<sub>2</sub>S/m<sup>2</sup>/hr at organic-poor, white and sandy tidal flats. We estimate the amount of hydrogen sulfide yearly released from tidal flats in Japan to be about 90 tons S based on the emission rates measured in this study. This value is far smaller than the values, some million tons of sulfur, evaluated indirectly by previous investigations. The atmospheric sulfur over Japan is supplied chiefly by man-made sulfur dioxide, and hydrogen sulfide released from tidal flats is negligible.
Chikyukagaku 15(2), 45-52, 1981
The Geochemical Society of Japan