Perbandingan Gugus Fungsi dan Morfologi Permukaan Karbon Aktif dari Pelepah Kelapa Sawit Menggunakan Aktivator Asam Fosfat (H3PO4) dan Asam Nitrat (HNO3): Comparison of Functional Groups and Morphologies of Activated Carbon Surfaces from Palm Tree Fronds Using Phosphoric Acid (H3PO4) and Nitric Acid (HNO3) Activators. st [Internet]. 2018 Dec. 20 [cited 2026 May 1];1(2):204-8. Available from: https://talentaconfseries.usu.ac.id/index.php/st/article/view/299