Halloysite nanotube applications for heavy metals removal from wastewaterCristina Covaliu, Gigel Paraschiv, Oana Stoian, Bogdan Buzatu, Costin Mircea and Camelia CristeaE3S Web Conf., 112 (2019) 04010DOI: https://doi.org/10.1051/e3sconf/201911204010