Testing the role of electrode materials on the electro-Fenton and photoelectro-Fenton degradation of clopyralid

Exploring the pressurized heterogeneous electro-Fenton process and modelling the system

“…Additionally, it is operated under moderate pressures, and so it seems suitable from an industrial point of view, since gauge pressures up to 10 bar are easily managed with conventional commercial electrochemical cells and require very low energetic costs for compression [17]. Furthermore, the hydrogen peroxide production rate obtained in the present study is in the range of those reported with typical carbon-based cathode materials when no GDE are used (0.06-5.83 mg cm -2 h -1 ) [19,20,[33][34][35]. Considering all this, the installation proposed in this research can efficiently achieve hydrogen peroxide production rates that are competitive compared with other systems reported in the literature while at the same time the setup configuration has potential for a future industrial implementation.…”

Novel Ti/RuO2IrO2 anode to reduce the dangerousness of antibiotic polluted urines by Fenton-based processes

“…Bergmann et al [36] reported that electrolysis of chlorine solutions with MMOs leads to the formation of chlorate, but no perchlorate was detected. Santos et al [24], also demonstrated that when using MMO in the EF and PhEF processes, chlorates were formed, while no perchlorates were found, and that the irradiation of UV light favors the accumulation of both chloro-species in the reaction media. The formation of these species can also have an important impact in the aim of decreasing the dangerous of hospital urines.…”

“…In addition, UVC light can contribute to the direct photolysis of aromatic molecules. Santos and co-workers [24] studied the degradation of clopyralid using EF and PhEF using different anodes. In both processes, the mineralization of the compound was obtained; however, the efficiency of the process and the synergy of the technologies was higher when using PhEF.…”

Towards a more realistic heterogeneous electro-Fenton

“…It could be suspected that the difference in the hydrogen peroxide production between lab and bench scale was due to the change from a carbon felt cathode at lab assays to a CB/PTFE/Ti one at bench assays, since there is plenty of evidence in the literature that points out that incorporating the CB/PTFE mixture on the cathode enhances hydrogen peroxide generation [39][40][41]. However, it should be noted that in a previous investigation of the bench-scale setup, where bare carbon felt was used, it was determined that after 45 mins of experiment (corresponding to a specific charge of 0.75 A h L −1 ), 33 mg L −1 of hydrogen peroxide were obtained, equivalent to a mass generation of 33 mg [12].…”