鉄鋼スラグ散布による沿岸海域底泥からの硫化物の溶出抑制とアンモニア性窒素の溶出の検討

概要

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The removal of sulfides in seawater under anaerobic condition by using powder converter slag (particle size, 53-75μm) was examined. The release of ammonium from coastal bottom sediments by the slag was also examined.Sulfides were quantitatively removed by the slag. The amount of removal was 31.7mgS.g-1 and 14.5mgS.g-1 at pH 8.2 and 9.0, respectively. The sulfide removal decreased with an increase in pH and was 1.7 mgS.g-1 at pH 9.9. Surface analysis of slag by a X-ray microanalyzer indicated that sulfides were removed mainly at C region which consisted mainly of CaO and SiO2 without any inhibition of phosphorous removal.The addition of the slag to bottom sediments may enhance the release of ammonium from the sediments with an increase in pH due to dissolution of free calcium oxide in slag.
社団法人　日本水環境学会の論文
1997-10-10