M. A. . Abdulrazaq, I. M. . Shuaibu, and I. M. . Agava, “Synthesis of Zeolite a From Kaolin and Its Adsorption Potential for the Removal of Pb, Cr, and Cd from Refinery Wastewater”, Appl. Res. Innov., vol. 4, no. 1, pp. 71–80, Apr. 2026, doi: 10.54536/ari.v4i1.6504.