CHAIYASITH, S.; SEPTHUM, C. Treatment of Coal Fly Ash for Cation Exchange Capacity Improvement. CURRENT APPLIED SCIENCE AND TECHNOLOGY, Bangkok, Thailand, v. 3, n. 3, p. 38–44, 2018. Disponível em: https://li01.tci-thaijo.org/index.php/cast/article/view/153699. Acesso em: 26 aug. 2026.