混合金属酸化物アノードを用いた合成尿の電気酸化・消毒と分子状水素生成の可能性
This study examined the performance of mixed metal oxide anodes in the electro-oxidation and disinfection of synthetic urine, while simultaneously evaluating the feasibility of recovering molecular hydrogen gas as a commercially valuable byproduct. Operational parameters including pH, current density, treatment duration, and N/Cl ratio were systematically assessed using response surface methodology. Under optimized batch conditions, COD and TOC reductions of 87.25% and 85.88% were achieved within 8.8 hours, respectively. Complete inactivation of E. coli-spiked wastewater was accomplished in 45 minutes. Incorporating photo-electrocatalysis reduced the required processing time to 6 hours. The anode material demonstrated durability over 100 reuse cycles (207.5 hours total). Intermediate compounds generated during the process were characterized by LC-MS analysis. A techno-economic assessment under optimized conditions estimated the cost at 0.85 USD per kilogram of COD removed.
Electro-oxidation at mixed metal oxide anodes drives oxidative degradation of organic compounds in synthetic urine, while the cathodic half-reaction generates molecular hydrogen gas as a byproduct; photo-electrocatalysis further accelerates the overall oxidation process.
The delivery route is not clearly identifiable from this paper. For hydrogen intake, inhalation is the most efficient route; inhalation, however, carries explosion risk (empirical LFL of 10%; high-concentration devices are not recommended).
See also:
https://h2-papers.org/en/papers/31783214