Chitosan augmented activated charcoal for adsorption of reactive red 21 dye from solution phase . Indian Journal of Chemistry (IJC), [S. l.], v. 64, n. 2, p. 127–136, 2025. DOI: 10.56042/ijc.v64i2.9761. Disponível em: https://or.niscpr.res.in/index.php/IJC/article/view/9761. Acesso em: 15 may. 2026.