“Pengaruh Variasi Massa dan Waktu Kontak Biochar Lumpur IPAL Teraktivasi NaOH terhadap Adsorpsi Cr(VI)”, jse, vol. 11, no. 3, Aug. 2026, Accessed: Sep. 14, 2026. [Online]. Available: https://jse.serambimekkah.id/index.php/jse/article/view/2110