潮間帯から発生する硫化水素量

概要

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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_2S/m^2/hr). The hydrogen sulfide emission rates are detected to be only about 1 to 2 μ mol H_2S/ m^2/hr at organic-rich, black and muddy tidal flats, except one site, and less than 0.1 μ mol H_2S/m^2/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.
日本地球化学会の論文
1981-12-30