Ni`mah, L., Mahfud, M., & Juliastuti, S. R. . (2022). Study of Activated Carbon from Coconut Shell Waste to Adsorb Cu and Mn Metals in Acid Mine Drainage. Journal of Fibers and Polymer Composites, 1(1), 34–42. https://doi.org/10.55043/jfpc.v1i1.35