Assessment of groundwater metals contamination using geoelectric methods and pollution index around nickel mine Pomalaa District, Kolaka Regency, Southeast SulawesiNur Robithotul Sugiono, Ferryati Masitoh, Denis Mararis and KurniawanBIO Web Conf., 146 (2024) 01038DOI: https://doi.org/10.1051/bioconf/202414601038