Sottisopha, W. and Asavapisit, S. (2015) “Immobilization of the Plating Sludge by Activation of Pulverized Fuel Ash with Sodium Silicate Solution”, Science & Technology Asia, 10(4), pp. 7–15. available at: https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/41564 (accessed: 17 September 2026).