Investigation of the Pb(II) adsorption from aqueous solution using biochar derived from ground coffee. Vietnam Journal of Catalysis and Adsorption, [S. l.], v. 15, n. 3, p. 59–64, 2026. DOI: 10.62239/jca.2026.047. Disponível em: https://jca.edu.vn/index.php/jca/article/view/2026.047.. Acesso em: 14 oct. 2026.