Modification of Coal Fly Ash Waste into Manganese-Oxide-Coated-Zeolite (MOCZ) to Adsorb Heavy Metal Ions Ni2+. Valensi [Internet]. 2024 Jun. 11 [cited 2025 Oct. 27];10(1):133 – 144. Available from: https://journal.uinjkt.ac.id/valensi/article/view/35794