“Optimasi Removal Logam Pb Sungai Porong Sidoarjo Terdampak Lumpur Lapindo Menggunakan Biokoagulan Ekstrak Daun Mangga”. Journal of Research and Technology 10, no. 1 (June 1, 2024): 83–90. Accessed October 17, 2026. https://journal.unusida.ac.id/index.php/jrt/article/view/1116.