Abstract
An advanced electrochemical oxidation process (electro-peroxone) involving a dual electrode system was developed to degrade recalcitrant carbamazepine (CBZ). During this electro-peroxone (E-peroxone) process, ozone was electrochemically produced by anodic oxidation of water in a membrane electrode assembly (MEA) cell and H2O2 was simultaneously generated by the sparged O2 using a carbon-polytetrafluorethylene (C-PTFE) cathode. The O3 and H2O2 electrogenerated in situ synergistically produce hydroxyl radicals (OH), which are much more easily oxidized than O3. As a result, the removal efficiencies of CBZ and its TOC reached 99.8% and 97.6% after 15min and 90min of E-peroxone treatment, respectively, these figures remaining stable after multiple tests. The E-peroxone process is therefore a promising and effective method for degrading ozone-refractory organic contaminants in wastewater.
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