Organic Waste of Vegetable and Fruit Waste as Adsorbent of Nickel (Ni2+) in Sea Water Pomalaa, Kolaka District, Southeast SulawesiUmmul Fariha, Zahwa Azzahrah, Syahlaa Ramadhani Sultan, Muhammad Fajri Ramadhan, Hasnia Arami and Rina Sardiana SariBIO Web Conf., 192 (2025) 04003DOI: https://doi.org/10.1051/bioconf/202519204003