Lawal, A. A.; Dzivama, A. U.; Aviara, N. A.; Hassan, M. A.; Zakaria, M. R.; Shirai, Y. Evaluation of Pyrolyzed Oil Palm Frond in the Adsorption of Residual Phenolic Compounds in Facultatively Treated Palm Oil Mill Effluent. AZOJETE 2022, 18, 729-740.