PROCESS FOR REMOVAL OF CHROMIUM ION FROM LEATHER INDUSTRIAL WASTES BY ACTIVATED PURE RICE HUSK. FUDMA JOURNAL OF SCIENCES, [S. l.], v. 4, n. 4, p. 334–338, 2021. DOI: 10.33003/fjs-2020-0404-490. Disponível em: http://162.254.38.185/index.php/fjs/article/view/490. Acesso em: 17 sep. 2025.