Pengaruh Penambahan NaOH Dan Ca(OH)2 Terhadap Penurunan Kadar Logam Berat (Fe) Di Kolong Tambang 23 Desa Kimhin Kecamatan Sungailiat: The Effect of the Addition NaOH and Ca(OH)2 at Reduced Levels of Heavy Metal (Fe) in Tambang 23 Kimhin Village of Sungailiat Subdistrict. mineral 2020, 2 (2), 56-61. https://doi.org/10.33019/mineral.v2i2.1552.