Removal of Organic material contaminants from wastewater of a petroleum refinery by Employing Ultrasound. International Journal of Current Engineering and Technology, [S. l.], v. 8, n. 2, p. 254–257, 2018. Disponível em: https://ijcet.evegenis.org/index.php/ijcet/article/view/1532. Acesso em: 13 mar. 2026.