Diseño de un sistema de electrodeposición para la eliminación de cromo de las aguas residuales de la industria galvánica.

Abstract

In the present project, an electrochemical cell was designed, which is a container where plates called electrodes were placed, where, by means of electric current, it was accomplished the removal of hexavalent chromium in wastewater that comes from an electroplating company called MetalGalvano. The water was treated in a batch and static electrochemical reactor. The design was made up of different combinations of electrodes, voltage, and time, where the number of electrodes varied between 2, 4 and 8; the cell voltage of 8 or 16 volts; and times of 20 and 40 minutes. The characterization and analysis of the treated wastewater samples after each electrochemical process indicated the efficiency in each combination, being able to determine which parameters best fit their treatment. In this context and after finishing the work, the conditions and parameters that best fit the removal of hexavalent chromium were: 8 electrodes (0.018 m2), 40 minutes of treatment time and 8 volts; achieving a hexavalent chromium removal efficiency of 88.99% from a hexavalent chromium concentration of 124 to 13.65 mg/L.