TARIGAN, K.; SIHOMBING, J. .; BARUS, A. Evaluation the adsorption ability of carbon onion peel on Ca ions. Jurnal Rekayasa, Teknologi Proses dan Sains Kimia (REPROKIMIA), [S. l.], v. 2, n. 2, p. 61–70, 2023. DOI: 10.68115/reprokimia.v2i2.133. Disponível em: http://akses.ptki.ac.id/jurnal/index.php/reprokimia/article/view/133. Acesso em: 24 oct. 2026.