Guntama D, Nuriani Dewi M, Nulhakim L, Armawan Sandi S, Trisnaeni A, Lintang A. Utilization of Active Charcoal of Arabica Coffee (Coffea arabica) With Chloride (HCl) and Phosphoric Acid (H3PO4) Activator as Adsorbent of Metal Chromium (Cr) in Textile Waste. J. Migasian [Internet]. 2023 Jun. 30 [cited 2026 Nov. 2];7(1):1-11. Available from: https://ojs.itpb.ac.id/index.php/jurnal-migasian/article/view/226