In:
Water Science and Technology, IWA Publishing, Vol. 65, No. 11 ( 2012-06-01), p. 2079-2083
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, 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.
Type of Medium:
Online Resource
ISSN:
0273-1223
,
1996-9732
DOI:
10.2166/wst.2012.108
Language:
English
Publisher:
IWA Publishing
Publication Date:
2012
detail.hit.zdb_id:
764273-8
detail.hit.zdb_id:
2024780-1
SSG:
14
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