TINGO PROAÑO, E.; ACOSTA, R. Wasted Roast and Ground Coffee as Bioadsorbent to Removal Arsenic (V) in Water. Química Central, [S. l.], v. 2, n. 1, p. 49–59, 2011. DOI: 10.29166/quimica.v2i1.571. Disponível em: https://revistadigital.uce.edu.ec/index.php/QUIMICA/article/view/571. Acesso em: 19 feb. 2026.