Optimization of Domestic Wastewater Treatment Using a Mixture of Coconut Shell Activated Carbon Adsorbent and Fly Ash. Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam, [S. l.], v. 21, n. 2, p. 122–133, 2024. DOI: 10.31851/sainmatika.v21i2.16246. Disponível em: https://jurnal.univpgri-palembang.ac.id/index.php/sainmatika/article/view/16246. Acesso em: 21 jun. 2026.