RAHAYU, B. P.; AMARIA. Synthesis of Activated Carbon from Coffee Bean Skin to Reduce BOD in Liquid Waste from Rambak Cracker Industry. Helium: Journal of Science and Applied Chemistry, [S. l.], v. 5, n. 2, p. 98–104, 2025. DOI: 10.33751/helium.v5i2.17. Disponível em: https://helium-fmipa.unpak.ac.id/index.php/he_jsac/article/view/17. Acesso em: 16 dec. 2025.