Muhammad Faisal, and Asri Gani and Abubakar. “REMOVAL OF COPPER IONS FROM AQUEOUS SOLUTION USING PALM SHELL CHARCOAL ACTIVATED BY NAOH”. GEOMATE Journal 15, no. 48 (May 18, 2018): 143–147. Accessed July 10, 2025. https://geomatejournal.com/geomate/article/view/906.