Chaiyasith, Suwan, and Chutima Septhum. “Potential of Treated Fly Ash for Removal of Lead from Wastewater”. Science & Technology Asia 9, no. 3 (November 3, 2015): 1–6. Accessed May 4, 2024. https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/41632.