Investigation of the Ni(II) adsorption isotherm onto biochar derived from cassava stem. Vietnam Journal of Catalysis and Adsorption, [S. l.], v. 14, n. 4, p. 7–12, 2025. DOI: 10.62239/jca.2025.055. Disponível em: https://jca.edu.vn/index.php/jca/article/view/2025.055.. Acesso em: 4 dec. 2025.