Electrochemical Degradation of Amoxicillin on a Ti/Ta2O5/Pt-RuO2-IrO22 Electrode

Electrochemical comparative study of Ti/Ta2O5/Pt‐RuO2‐IrO2 and Ti/Ta2O5/Pt anodes: Stability, service lifetime, and electrooxidation performance

“…The increase in the COD removal rate the presence of NaCl is much faster than in the absence of NaCl. After 10 h of electrolysis, the various COD removal rates obtained on the PRI and Pt electrodes are 73.79% 19 and 65.16%, respectively, which are greater than 50%. This results shows that, in the presence of NaCl, the electrochemical degradation of amoxicillin on PRI electrode must occur mainly via indirect process by active chlorine.…”

“…On the PRI electrode, the change in COD is almost stationary (insert of Figure 7i). The COD reduction rates obtained after 10 h of electrolysis are 0.83 19 and 36.89% respectively on PRI and Pt. According to these results, these two electrodes lead The relatively low COD abatement rates obtained with the two electrodes are related to their nature.…”

“…These two electrodes have been physically characterized in our previous work. 19,35 The curve of the potential as a function of the polarization duration of the Pt electrode (Figure 4i) can be divided into three parts: the first part is characterized by an almost constant potential; it is between 0 to 125 h with a potential around 3 V. The second part is between 125 to 235 h. In this part, there is a slight increase in the potential which goes from 3 to 6.7 V. As for the third part, it is located after 235 h and is characterized by a very rapid increase in the potential which reaches 73 V after 256 h of polarization. This increase in potential reflects the deactivation of the Ti/Ta 2 O 5 /Pt electrode, probably due to a detachment of the Pt deposit.…”

“…The results obtained under our experimental conditions attest that Pt and PRI electrodes lead to the conversion of the parent compound into intermediate compounds. Indeed, the coloration of amoxicillin, initially colorless, takes a dark yellow color after 10 h of electrolysis on PRI electrode 19 which suggests that some part of amoxicillin was degraded to other organic matter. The same observation was made during the amoxicillin degradation on the Pt electrode under a current density of 20 mA/cm 2 in 0.1-M KClO 4 .…”

“…Electrooxidation is one of the methods commonly used for the degradation of organic compounds. [19][20][21][22] This technique has many advantages: it is friendly to the environment, it requires little or no addition of chemicals, it works with simple equipment, and the reaction can be easily stopped by turning off the power. 23,24 However, its effectiveness depends on various operational parameters such as the material used at the anode, temperature, initial organics concentration, supporting electrolyte, pH, current density, and others.…”