Extraction of cadmium from phosphoric acid by a synthesized extracting agent Kaoutar Berkalou, Abderrahman Nounah, Mohamed Khamar, Ratiba Boussen and Essediya Cherkaoui E3S Web Conf., 150 (2020) 02007 Published online: 12 February 2020 DOI: 10.1051/e3sconf/202015002007