Budput, Anyamanee, Dickson Y.S. Yan, May Thu Than Htikea, Pummarin Khamdahsag, and Visanu Tanboonchuy. “Hexadecyltrimethylammonium-modified fly-ash zeolite for sulfate removal in treated coal-fired power plant effluent”. Engineering and Applied Science Research 50, no. 4 (August 7, 2023): 350–358. accessed August 29, 2026. https://ph01.tci-thaijo.org/index.php/easr/article/view/251869.