Akanbi Olusola, and Babayemi A.K. “Comparative Analysis of Heavy Metal Removal Using Activated Bamboo and Periwinkle Shell, a Case Study of Cr (III) Ion”. Global Journals of Research in Engineering 19, no. C2 (May 15, 2019): 35–57. Accessed May 5, 2024. https://engineeringresearch.org/index.php/GJRE/article/view/1970.