Distribution of arsenic in an argillaceous sample using sequential chemical extractions: application to the Hydrogeological Experimental Site of Poitiers (HESP)Rana Mhanna, Aude Naveau, Maité Bueno, Laurent Caner and Joseph BassilE3S Web Conf., 98 (2019) 09018DOI: https://doi.org/10.1051/e3sconf/20199809018