Reducing energy use is crucial to commercialize electrochemical oxidation technologies. We developed a three-dimensional (3-D) electrochemical system that can significantly reduce the applied voltage and effectively degrade organic contaminants in low ionic strength wastewaters. The 3-D system consisted of a composite wire mesh anode (comprised of blue TiO2 nanotubes covered by SnO2-Sb2O3), a proton exchange membrane (PEM), and a stainless-steel wire mesh cathode, which were compressed firmly together. For the 3-D system, we placed the anode of a 3-D electrode toward the wastewater that flowed past the anode. Both the 2-D and the 3-D systems had the same anode and cathode. We found that the 3-D system could reduce the applied voltage 75.7% and EE/O 73% for 0.001 M Na2SO4. For Na2SO4 concentrations greater than 0.05 M, the 2-D system had a slightly lower EE/O. We also compared the EE/O of EAOPs to other AOPs (UV/H2O2, UV/Persulfate, O3/H2O2, UV/ TiO2 and UV/ Chlorine). We found that EAOPs have a much higher EE/O for low BA concentrations (20 mg/L) and a much lower EE/O for high BA concentrations (2000 mg/L).

Development of a three-dimensional electrochemical system using a blue TiO2/SnO2-Sb2O3 anode for treating low ionic strength wastewater

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.