主催: 日本エネルギー学会, 石炭科学部会, コークス工学研究部会, 重質油部会
共催: 日本学術振興会 石炭・炭素資源利用技術第 148 委員会, 化学工学会 エネルギー部会, （公財）北九州観光コンベンション協会, ガス化部会, 燃焼部会, 「エネルギー学」部会
会議名: 第55回石炭科学会議
回次: 55
開催地: 北九州国際会議場
開催日: 2018/10/29 - 2018/10/30
p. 20-21
Coal fly ash(CFA),which contains hazardous elements such as selenium and boron. These elements are easily leached out to water environment and contaminate the surface and groundwater. The leaching amount of these hazardous elements from CFAs exceeded the environmental standards of soil and landfill sometimes. In this study, effects of aging process on the leaching of hazardous elements from CFAs was examined. The leaching amount of selenium, boron, chromium and fluorine from CFAs decreased with the lapse of aging time. Selenium leaching from aged CFAs was influenced by the calcium content in original CFAs. The results of XRD analysis indicated selenium in aged CFAs was immobilized by hydrated minerals such as ettringite.
