doi:10.1016/j.jwpe.2021.102181engDuque L.Gutiérrez L.Menéndez N.Herrasti P.Mazario E.Novel, simple, and environmentally safe method for wastewater pollutant removalART-2021-127077In this work, a new methodology has been developed for the elimination of cobalt, nickel and a mixture of both metals from synthetic wastewater in a continuous way. This methodology consists of the electrochemical formation of ferrites of these metals through the oxidation of iron sheets and the reduction of water. Two critical process parameters, current densities and initial pollutant concentration, were analysed. An initial batch prototype resulted in efficiencies on the order of 98% under conditions of applied densities of 50 mA/cm2 and concentrations of both metals of until 100 ppm of the ions. The obtained particles have been characterized by X-ray diffraction to determine the formation of ferrites without the appearance of secondary phases. The formed particle sizes are approximately 30 nm, with hemispherical or flower-like shapes. A flow system prototype was designed for the recirculation of the solution with 100 ppm of both contaminating metals, obtaining approximately 90% recovery with an easy magnetic harvesting. © 2021 The Authors2021http://zaguan.unizar.es/record/11738310.1016/j.jwpe.2021.102181http://zaguan.unizar.es/record/117383oai:zaguan.unizar.es:117383info:eu-repo/grantAgreement/ES/MICINN/PGC2018-096016-B-I00info:eu-repo/grantAgreement/ES/MINECO-FSE/PGC2018-095642-B-I00Journal of Water Process Engineering 42 (2021), 102181 [9 pp]by-nc-ndhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccess