Influence of chemical and thermal treatment on the purity of silica extracted from rice husk. Iraqi Journal of Physics, [S. l.], v. 16, n. 39, p. 117–123, 2019. DOI: 10.30723/ijp.v16i39.109. Disponível em: https://ijp.uobaghdad.edu.iq/index.php/physics/article/view/109.. Acesso em: 29 apr. 2024.