Alteration of Coal Fly Ash Induced by Aging Treatment: Insights from Mineral Quantification Analysis.

ABSTRACT: The mineral composition of coal fly ash (FA) subjected to an aging treatment was analyzed using mineral liberation analysis (MLA) to elucidate the alteration behavior of FA, including changes in the leaching behavior of toxic elements such as B, As, and Se. Three types of FA generated from a coal-fired power plant in Japan, with initial pH values of 4, 9, and 12, were subjected to leaching experiments. These FA samples exhibited different alteration behaviors depending on their initial pH. FA1, with a pH of 12, exhibited a significant decrease in the leaching of B and Se after aging, and the MLA results revealed a slight change in the major mineral contents. However, the amount of ettringite, Ca₆Al₂(SO₄)₃(OH)₁₂•26H₂O, slight

SUBMITTER: Seki T 

PROVIDER: S-EPMC12547556 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature