Paputungan , Mardjan, Nita Suleman, and Yulia Rahman Yunus. 2023. “Adsorption Power of Activated Charcoal from Coconut Shells on Lead Metal (Pb) in Well Water”. Jurnal Penelitian Pendidikan IPA 9 (11):9270-77. https://doi.org/10.29303/jppipa.v9i11.4387.