We have developed a novel electrochemical advanced oxidation (EAOP) process, electro-peroxone (E-peroxone), by electrochemically generating H2O2 at carbon-based cathodes from O2 during conventional ozonation process. Results show that the in-situ generation of H2O2 can significantly improve water treatment performance in many ways. It eliminates the requirement of conventional O3/H2O2 (i.e., peroxone) process for addition of external H2O2, which is an expensive chemical and dangerous to ship and handle due to its high reactivity. The in-situ generated H2O2 can enhance O3 transformation to •OH, thus greatly enhance pollutant degradation, especially O3-refractory ones. In addition, the in-situ generated H2O2 can effectively inhibit bromate formation, which has been a major drawback associated with O3-based processes. Furthermore, the whole process uses only clean electricity and oxygen, and does not produce secondary pollutants. The E-peroxone process may thus provide a safe, effective, and environmentally-friendly technology for water and wastewater treatment. Recent progress on this new technology will be reported.

Electro-peroxone: a promising electrochemical advanced oxidation process for water and wastewater treatment

250th National Meeting (2015)

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