Heavy metal content in the waste sludge from a paint manufacturing plant showed hexavalent chromium concentrations above the regulatory limit according to European standards. The objective of this study was the removal of Cr using the electrokinetic method. To achieve this, a comparative evaluation of two electrolytes was conducted to identify the most effective option for Cr(VI) removal. The electrolytes tested were sulfuric acid and citric acid (1 M). Electrokinetic experiments were performed under potential differences of 5 and 15 V for 10 days. The results showed that citric acid was more effective than sulfuric acid in removing Cr(VI) due to citric acid capacity to extract and dissolve Cr from the solid matrix and its contribution to the electromigration and electroosmosis. Specifically, 76% of Cr(VI) was removed with citric acid at 5 V, with an energy consumption of 3.27 Wh, compared to a removal of 70% with sulfuric acid at the same voltage, requiring 4.75 Wh of energy. Increasing the potential difference to 15 V resulted in lower Cr(VI) removal efficiency for both electrolytes. At 15 V, the removal ratio dropped to 68.93% for citric acid and 58% for sulfuric acid.