The use of natural materials as adsorbents and color removal of municipal wastewater. Journal of the College of Basic Education, [S. l.], v. 18, n. 74, p. 229–240, 2023. DOI: 10.35950/cbej.v18i74.9394. Disponível em: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/9394.. Acesso em: 3 aug. 2026.