Removal of Chromium and Lead from Industrial Wastewater Using Effective Microorganisms (EM) Technology. Tikrit Journal of Engineering Sciences, [S. l.], v. 18, n. 1, p. 9–18, 2011. DOI: 10.25130/tjes.18.1.07. Disponível em: https://tj-es.com/ojs/index.php/tjes/article/view/489.. Acesso em: 9 sep. 2026.