Simultaneous adsorption behaviour of heavy metals from Oil Mill Wastewater onto natural clayHanane Ait Hmeid, Mustapha Akodad, Mourad Baghour, Abdelmajid Moumen, Ali Skalli, Hicham Guedarri, Yassine El Yousfi, Mostapha Maach, Ouassila Riouchi and Ghizlane AziziE3S Web Conf., 314 (2021) 08002DOI: https://doi.org/10.1051/e3sconf/202131408002