Heavy metal contamination in surface water of Mohammedia wetland, MoroccoHalima Jounaid, El Mehdi El Hachimi, Nihad Chakri, Toufik Remmal, Btissam Elamrani and Fouad AmraouiE3S Web Conf., 298 (2021) 05001DOI: https://doi.org/10.1051/e3sconf/202129805001