Increasing the current efficiency of chromium in the electrochemical reduction of chromium (VI) ions

The electrochemical treatment method for wastewater and waste solutions is compact, efficient, and is divided into cathodic reduction, electrodialysis, and electrocoagulation. At the same time, it should be noted that during the electrochemical reduction of chromium(VI) ions, the current efficiency of chromium is very low (15-16%), however, this method can purify wastewater from impurities to MPC. The purpose of the research to study the effect of glycerol on the current efficiency of chromium during the electrolysis of waste solutions and to determine the optimal process conditions. It has been established that during the electrolysis of waste solutions to be purified, the use of 1.8% glycerol as an additive to the test electrolyte under certain conditions increases the current efficiency of chromium from 18 to 23.5%.