Anastasya, Yohana, et al. “Hydrothermal Synthesis of Nb2O5-Natural Zeolite Composite for Enhanced Adsorptive Removal of Anionic and Cationic Dye”. Greensusmater, vol. 1, no. 2, Dec. 2024, pp. 63-67, doi:10.62755/greensusmater.2024.1.2.63-67.