Author/Authors :
bako, fabrice y. roland université ouaga 1 pr joseph ki-zerbo - laboratoire de chimie analytique, environnementale et bioorganique (lacebio), département de chimie, ll unité de formation et de recherche en sciences exactes et appliquées (ufr-sea), Ouagadougou, Burkina Faso , zongo, inoussa centre national de la recherche scientifique et technologique (cnrst) - institut de recherche en sciences appliquées et technologies (irsat) - laboratoire des technologies de l’environnement et des produits naturels (ltepn), Ouagadougou, Burkina Faso , tapsoba, issa université ouaga 1 pr joseph ki-zerbo - laboratoire de chimie analytique, environnementale et bioorganique (lacebio), département de chimie, ufr/sea, Ouagadougou, Burkina Faso , baga, barthélemi université ouaga 1 pr joseph ki-zerbo - laboratoire de chimie analytique, environnementale et bioorganique (lacebio), département de chimie, ufr/sea, Ouagadougou, Burkina Faso , diallo-koné, martine centre national de la recherche scientifique et technologique (cnrst) - institut de recherche en sciences appliquées et technologies (irsat) - laboratoire des technologies de l’environnement et des produits naturels (ltepn), Ouagadougou, Burkina Faso , konaté, yacouba institut international d’ingénierie de l’eau et de l’environnement (2ie) - laboratoire eau, dépollution, ecosystèmes et santé (ledes), unite thematique d enseignement et de recherche en gestion et valorisation de l eau et de l assainissement (uter-gvea), Ouagadougou, Burkina Faso
Abstract :
The present work presents the results obtained during the treatment of a synthetic aqueous solution contaminated by zinc or iron at the laboratory scale by electrocoagulation process. Iron and aluminum electrodes are used separately. The influence of the electrocoagulation parameters as well as the pH of the liquid have been studied. In order to understand the process of EC, natural decanting was done after EC. The treatment with the iron and aluminum plates with a voltage of 1.5V and a current density of 1.5 A.m^-2 allowed a heavy metal removal after 5 hours of settling. It was found that the treatment duration, the settling time and the pH of the medium play a major role in the treatment by electrocoagulation. The treatment with Aluminum electrode allowed 54.47% and 100% removal of Zinc and iron respectively whereas iron electrode allowed 40.65% and 100% removal of zinc and iron respectively. The treatment with aluminum electrode allows fast removal of the two heavy metals in solution. Treatment with aluminum blades seems to be more effective than iron blades.
Keywords :
electrocoagulation , iron electrode , aluminum electrode , zinc , iron pH , durati
