Sanusi, K.A., Yahaya, Y., Ambrusa, M.M., Yahaya, Y. and Hammed, A.M. 2021. OPTIMIZATION OF ADSORPTION OF Pb (II) AND Cr (VI) FROM AQUEOUS SOLUTION USING MODIFIED FELDSPAR COMPOSITE: ISOTHERM AND KINETIC STUDIES. International Journal of Engineering Science Technologies. 5, 4 (Jul. 2021), 18–53. DOI:https://doi.org/10.29121/ijoest.v5.i4.2021.200.