Electrocoagulation process applied on pollutants treatment- experimental optimization and fundamental investigation of the crystal violet dye removal
The removal crystal violet (CV) from wastewater solutions was performed by electrocoagulation process
based on an aluminum sacrificial anode. The effect of the operating parameters was experimentally
investigated; a complete removal was achieved after 1 h electrolyses, and various ‘short times’
electrolyses were carried out to fundamentally investigate the main physical phenomena conditioning
flocs formation and allowing to achieve satisfactory coagulation rates.
A simplified theoretical model was proposed to predict the dye removal rate and to design an
electrochemical reactor. It is based on a mechanism, involving Al(OH)3 oligomers formation, and
competition between electrochemical oxidation and coagulation rate. The good agreement between
simulation and experiments, allows i) the required kinetic constant value to be determined and ii) the
limiting step to be defined as a reaction involving one Al(OH)3 fixating 4 molecules of the crystal violet.
The presented results may be easily extrapolated to other dyes removal.
Auteur(s) : Maryam Khadim Mbacké, Cheikhou Kane, Ndeye Oury Diallo, Codou Mar Diop, Fabien Chauvet, Maurice Comtat, Theo Tzedakis
Pages : 4001-4011
Année de publication : 2016
Revue : Journal of Environmental Chemical Engineering
N° de volume : 4
Type : Article
Mise en ligne par : KANE Cheikhou