A novel combined electrochemical-magnetic method for water treatment

作者：Ibanez Jorge G^*; Luis Vazquez Olavarrieta Jorge; Hernandez Rivera Lydia; Adolfo Garcia Sanchez Martin; Garcia Pintor Elizabeth

来源：Water Science and Technology, 2012, 65(11): 2079-2083.

DOI：10.2166/wst.2012.108

• electrocoagulation
• magnetic removal
• water treatment

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, Fe2+ and Fe3+ ions are formed. As Fe3+ 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 Fe2+ and Fe3+ produced in an EC cell at various voltages were measured by spectroscopic methods to confirm that Fe3+ 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.

• 出版日期2012