indigo-carmine and hydroxide-ion

The aim of this study was to evaluate the performance of high purity magnesium and the magnesium-aluminum-zinc alloy AZ31 as sacrificial anodes in an electrocoagulation process with polarity change for the treatment of synthetic indigo carmine solution. It was studied the effect of the main parameters such as temperature, anodic material, current density, initial dye concentration, and agitation speed on the diminishing of indigo carmine concentration and non-purgeable organic carbon. Also, image analysis was used in conjunction with zeta potential measurements to understand the mechanism of flocs formation. The best results were 80% and 96% removal for non-purgeable organic carbon and dye content respectively at room temperature, by using turbulent regime, initial dye concentration of 100 mg L

Topics: Carmine; Coloring Agents; Electrocoagulation; Electrodes; Hydroxides; Indigo Carmine; Magnesium; Organic Chemicals; Oxidation-Reduction; Waste Disposal, Fluid; Water Pollutants, Chemical