Analysis of heavy metal Zn and Ni content in well water of residents around putri cempo landfillRaja Susatio, Siti Rachmawati, Ardita Ayu Wulandari, Marcella Paramitha Susilo Dewi, Muhammad Hafiz, Nisrina Hasna Fadhila and Salsabila Putri DamayantiE3S Web Conf., 682 (2025) 02003DOI: https://doi.org/10.1051/e3sconf/202568202003