Meiliyadi, L.A.D., Rahman, M.Z. and Zain, Z. 2024. Functional Group Analysis of Silica Gel Based on River Sand Magnetic Mineral as Heavy Metal Absorbance. KONSTAN - JURNAL FISIKA DAN PENDIDIKAN FISIKA. 9, 01 (Jul. 2024), 34-41. DOI:https://doi.org/https://doi.org/10.20414/konstan.v9i01.484.