Coffee Husk and Coffee Ground as an Adsorbent for the Removal of Lead, Copper and Chromium from Aqueous Solution. Pakistan Journal of Analytical & Environmental Chemistry, Pakistan, v. 24, n. 1, p. 106–117, 2024. DOI: 10.21743/pjaec/2023.06.10. Disponível em: http://pjaec.pk/index.php/pjaec/article/view/52. Acesso em: 12 jul. 2025.