Coffee Husk and Coffee Ground as an Adsorbent for the Removal of Lead, Copper and Chromium from Aqueous Solution. Pak. J. Anal. Environ. Chem. [Internet]. 2024 Nov. 15 [cited 2025 Jul. 12];24(1):106-17. Available from: http://pjaec.pk/index.php/pjaec/article/view/52