HEMAVIBOON, K.; KLAMTET, J. Removal of Methylene Blue Dye from Aqueous Solution by Adsorption on Leonardite Char. Asian Health, Science and Technology Reports, [S. l.], v. 28, n. 1, p. 82–93, 2020. DOI: 10.14456/nujst.2020.8. Disponível em: https://ph03.tci-thaijo.org/index.php/ahstr/article/view/1531. Acesso em: 11 oct. 2026.