“Treating Waste With Waste : Utilization of Iron Powder for the Reduction of Chromium (Cr6+) in Metal Plating Industry Liquid Waste”. Jurnal Serambi Engineering 9, no. 3 (July 8, 2024). Accessed February 22, 2025. https://jse.serambimekkah.id/index.php/jse/article/view/301.