INFLUENCE OF ACTIVATORS ON SPENT COFFEE GROUNDS AS BIOSORBENT FOR CHROMIUM: Original scientific paper. Chemical Industry & Chemical Engineering Quarterly, [S. l.], v. 31, n. 2, p. 105–111, 2025. DOI: 10.2298/CICEQ240126018Y. Disponível em: https://www.ache-pub.org.rs/index.php/CICEQ/article/view/1346. Acesso em: 18 apr. 2025.