N. U. Udeh, and B. L. James. 2022. “Optimum Conditions for the Removal of Lead from Aqueous Solution Using Paw-Paw Trunk Activated Carbon”. American Scientific Research Journal for Engineering, Technology, and Sciences 87 (1):1-8. https://asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/7298.