Abdulrazaq, M.A. et al. 2026. Synthesis of Zeolite a From Kaolin and Its Adsorption Potential for the Removal of Pb, Cr, and Cd from Refinery Wastewater. Applied Research and Innovation. 4, 1 (Apr. 2026), 71–80. DOI:https://doi.org/10.54536/ari.v4i1.6504.