Sono-electrochemical degradation of Orange G in pure water, natural water, and seawater: effect of operating parameters

Fenton Reagent for Organic Compound Removal in Wastewater

“…This observation can be applied to the field of SEF. With an ultrasound wave power of 15 W, it increases the removal rate of Orange G, but in an additive effect, rather than the synergistic effect in the SF process [64]. Furthermore, it affects EF positively due to the increment of mass transport and activation of the electrode via the impurity layer removal at the electrode surface.…”

A critical review on the sonochemical degradation of organic pollutants in urine, seawater, and mineral water

“…In addition to the above-mentioned primary parameters (frequency, power, and compound nature), the matrix also plays a determinant role in the cavitation (physical effects) and the elimination of the pollutants (chemical effects). Matrices such as seawater, mineral water, and urine are aqueous samples rich in salts/ions [16] , [18] , [19] , [26] , [52] . It is reported that upon saturation of water with salts of NaCl and KCl, a significant change in the physicochemical properties of water, modifying the regime of induction of cavitation bubbles.…”

“…Before closing this section, we should mention that the combination of ultrasound with electrochemistry (i.e., sono-electrochemistry) has also been used to deal with organic pollutants in mineral water [52] , [75] . Anodic oxidation using boron-doped diamond electrodes and low-frequency ultrasound (20 kHz) synergistically eliminate propylparaben in bottled mineral water.…”

“…Finally, the combination of low-frequency ultrasound (22.5 kHz) with electro-Fenton (using Fe 2+ , a platinum grid anode, and a carbon felt cathode) has been used to degrade orange G in mineral water. Such a sono-electro-Fenton system led to ∼ 94% of the dye degradation after 20 min of treatment, indicating this treatment is an interesting option to remove organic pollutants in mineral water [52] .…”

“…The combination of ultrasound with electro-Fenton (i.e., sono-electro-Fenton process) is another alternative that has been explored to deal with organic pollutants in seawater [52] . For example, the treatment of orange G, by combining low-frequency ultrasound (22.5 kHz) with electro-Fenton (ferrous ions, a platinum anode, and a carbon felt cathode), led to very rapid elimination of the dye in seawater (>90% of degradation after only 2 min).…”