Preparation of gamma-alumina as a catalyst And study its properties and use in Adsorption of chromium hexagon from water Sewage. Journal of the College of Basic Education, [S. l.], v. 20, n. 85, p. 38–51, 2022. DOI: 10.35950/cbej.v20i85.8613. Disponível em: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/8613.. Acesso em: 3 jul. 2024.