Chiririwa, Haleden, Thabo Matthews, Bothwell Nyoni, Stephen Majoni, and Bobby Naidoo. 2017. “Adsorption of Lead and Copper by Carbon Black and Sodium Bentonite Composite Material: A Study on Adsorption Isotherms and Kinetics”. Asian Journal of Chemistry 29 (12):2761-66. https://doi.org/10.14233/ajchem.2017.20877.