Removal of Congo Red Dye from Aqueous Solutions using Steam Activated Pigmented Rice Husk Carbon as an Adsorbent: A Thermodynamic Study. Journal of International Academy of Physical Sciences, [S. l.], v. 15, n. 6, p. 487–495, 2011. Disponível em: http://www.iaps.org.in/journal/index.php/journaliaps/article/view/663. Acesso em: 23 oct. 2026.