Chaiyasith, S. and Septhum, C. (2018) “Treatment of Coal Fly Ash for Cation Exchange Capacity Improvement”, CURRENT APPLIED SCIENCE AND TECHNOLOGY. Bangkok, Thailand, 3(3), pp. 38–44. available at: https://li01.tci-thaijo.org/index.php/cast/article/view/153699 (accessed: 26 August 2026).