Tokumura, M., Morito, R., Znad, H.T. and Kawase, Y., Research Center for Biochemical and Environmental Engineering, Department of Applied Chemistry, Toyo University, Japan
(free)
The Fenton process was applied to electricity poduction, hydrogen generation and carbon dioxide mitigation during wastewater treatment. In the wastewater treatment plant, where Fe plates and carbon plates were employed as the anode and cathode, respectively, Fe plates corroded and eluted ferrous ions into the solution by accompanying the production of electricity. Ferrous ions were used in the Fenton process. They produced the hydroxyl radicals oxidizing and mineralizing rapidly and nonselectively organic pollutants in wastwater. At the cathode, simultaneously, electrons transferred from the anode caused the hydrogen production. In other words, degradation of pollutants and production of electricity and hydrogen could be carried out simultaneously and effectively. Furthermore, the precipitation of FeCO3 by elevating solution pH may lead to CO2 sequestration. The experiments were conducted using Orange II solution as a model wastewater. The eluted ferrous ion concentration, electric current, hydrogen production rate and CO2 removal rate have been experimentally examined with a wide range of the operating conditions. Keywords Eletricity production; Hydrogen generation; Carbon dioxide sequestration; wastewater treatment; Fenton reaction
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