Chemical and Biological Leaching Methods to Remove Heavy Metals from Sewage Sludge: A Review. JOURNAL OF ADVANCES IN CHEMISTRY, [S. l.], v. 4, n. 3, p. 509–517, 2008. DOI: 10.24297/jac.v4i3.948. Disponível em: https://rajpub.com/index.php/jac/article/view/948. Acesso em: 23 jun. 2026.