Trisnawati, Elia, and Neni Damajanti. “Reduction of Heavy Metal Levels (Pb and Fe) in Chemical Laboratory Wastewater by the Coagulation Method Using Moringa Seeds Bio-Coagulants (Moringa Oleifera)”. Research in Chemical Engineering 2, no. 2 (November 22, 2023): 34–38. Accessed January 21, 2026. https://ejournal.ump.ac.id/rice/article/view/90.