Eco-Friendly Zinc Adsorption in Textile Wastewater Using Pyrolyzed Coffee WasteIndro Sumantri, Galih Wiji Agung, Wakhyu Nur Afni and Heri CahyonoE3S Web Conf., 655 (2025) 01024DOI: https://doi.org/10.1051/e3sconf/202565501024