Advances in the Electro-Fenton Process for Remediation of Recalcitrant Organic Compounds

The electro-Fenton (EF) process is a promising method combining electrochemical reactions and Fenton's reagent. In this hybrid process, the electrical current induces the in situ generation of H2O2 via reduction of oxygen, and the catalytic reaction is propagated by Fe2+ regeneration, which can take place by reduction of Fe3+ with H2O2, hydroperoxyl radical, organic radical intermediates, or directly at the cathode. Recent advances in the EF process are discussed and several key variables analyzed, including electrode material, initial pH, and Fenton's reagents, in order to extend the applicability of this technology.