title: A novel combined electrochemical-magnetic method for water treatment.
abstract: Electrocoagulation (EC) is a wastewater treatment process in which aqueous pollutants can be removed by adsorption, entrapment, precipitation or coalescence during a coagulation step produced by electrochemically generated metallic species. When using Fe as the sacrificial electrode, Fe(2+) and Fe(3+) ions are formed. As Fe(3+) species are paramagnetic, this property can in principle be used to facilitate their removal through the application of a magnetic field. In the present work we present a proof-of-concept for a combined electrochemical-magnetic method for pollutant removal. For this approach, the amounts of Fe(2+) and Fe(3+) produced in an EC cell at various voltages were measured by spectroscopic methods to confirm that Fe(3+) species predominate (up to 84%). The effectiveness of the presence of a magnetic field in the precipitation of coagulants from a suspension was confirmed by monitoring the turbidity change versus time with and without exposure to a magnetic field, up to a 30% improvement.
authors.affiliation: Centro Mexicano de Quimica Verde y Microescala, Depto. de Ing. y Ciencias Quimicas, Universidad Iberoamericana-Ciudad de Mexico, Prol. Reforma 880, Mexico, D.F. 01219, Mexico. jorge.ibanez@uia.mx
authors.forename: Jorge G
authors.initials: JG
authors.lastname: Ibanez
authors.forename: Jorge Luis
authors.initials: JL
authors.lastname: Vazquez-Olavarrieta
authors.forename: Lydia
authors.initials: L
authors.lastname: Hernandez-Rivera
authors.forename: Martin Adolfo
authors.initials: MA
authors.lastname: Garcia-Sanchez
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Garcia-Pintor
mesh_terms: D055664:Electrochemical Techniques; D007501:Iron / Q000737:chemistry; D060328:Magnetic Phenomena; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D014874:Water Pollutants, Chemical; D007501:Iron