Removal of Oil From Wastewater Using Walnut-Shell. Al-Khwarizmi Engineering Journal, [S. l.], v. 1, n. 1, p. 117–124, 2017. Disponível em: https://www.alkej.uobaghdad.edu.iq/index.php/alkej/article/view/26. Acesso em: 30 apr. 2025.