Chaiyasith S, Septhum C. Treatment of Coal Fly Ash for Cation Exchange Capacity Improvement. Curr. Appl. Sci. Technol. [internet]. 2018 Mar. 30 [cited 2026 Aug. 26];3(3):38-44. available from: https://li01.tci-thaijo.org/index.php/cast/article/view/153699