Pengaruh Variasi Massa dan Waktu Kontak Biochar Lumpur IPAL Teraktivasi NaOH terhadap Adsorpsi Cr(VI). Jurnal Serambi Engineering, [S. l.], v. 11, n. 3, 2026. Disponível em: https://jse.serambimekkah.id/index.php/jse/article/view/2110. Acesso em: 14 sep. 2026.