Sonde, Christopher Uchechukwu, Stevens Azubuike Odoemelam, and Francis Kalu Onwu. 2015. “Isotherm Studies of Equilibrium Sorption of Cu2+ and Cd2+ from Aqueous Solutions by Modified and Unmodified Breadfruit Seed Hull”. Orbital: The Electronic Journal of Chemistry 7 (3), 215-25. https://periodicos.ufms.br/index.php/orbital/article/view/17861.