石炭灰造粒物を用いた沿岸底質環境改善材開発のための基礎的研究　～栄養塩溶出試験およびSkeletonema costatumの増殖試験～

抄録

The Characterization of cement-granulated coal ash was carried out for the purpose of remediation of organically rich sediment by controlling the nutrient balance of ecosystems. The granulated coal ash used in this study is composed of SiO₂, CO₃, Al₂O₃, CaO with quartz and aluminum silicate as the main phases. Moderate dissolutions of phosphate, silicate and calcium were observed. This may be useful for the neutralization of the acidified sediment and effective for controlling the balance of nutrients in coastal seas. Although the growth of the diatom S. costatum was inhibited under the batch culture condition owing to pH increase, such a pH increase would not occur under natural conditions because of magnesium precipitates and carbonate equilibrium.