MORALES DIAZ, V. J. .; JAVE NAKAYO, J. L. .; BENITES ALFARO, E. . Use of coffee grind with cocoa shell as the basis for a filter to reduce lead from contaminated water from a river, Peru. Journal of Energy & Environmental Sciences, [S. l.], v. 2, n. 2, p. 24–29, 2018. Disponível em: https://journals.cincader.org/index.php/eesj/article/view/38. Acesso em: 22 apr. 2026.