Leke, L, T H Dekaa, S O Olawuyi, and F O Nwosu. 2019. “Kinetic and Thermodynamics of Adsorption of Heavy Metals from Spent Automobile Engine Oil onto Activated Carbon from Thevetia Peruviana”. NIGERIAN ANNALS OF PURE AND APPLIED SCIENCES 1 (March):167-75. https://doi.org/10.46912/napas.42.