ABDUL-AZIZ, Yasser; HASSAN, Zainab. Synthesis Eco-friendly Biochar from Spent Coffee for Using to Remove Acidic and Basic Dyes from Aqueous Media. Al-Nahrain Journal for Engineering Sciences, [S. l.], v. 29, n. 2, p. 353–363, 2026. DOI: 10.29194/NJES.29020353. Disponível em: http://old.nahje.com/index.php/main/article/view/1254.. Acesso em: 29 jul. 2026.