“Adsorption Isotherm and Kinetic Studies of Chitosan–Coffee Husk Carbon Composite Beads for the Removal of Congo Red and Methylene Blue”. ALKIMIA : Jurnal Ilmu Kimia Dan Terapan, vol. 9, no. 1, Feb. 2025, pp. 39-45, https://doi.org/10.19109/th8a3b88.