Water enrichment by hydroxyl and hydrogen peroxide due to cavitation treatment: GHz four-wave mixing spectroscopy

Four-waves mixing spectroscopy has been applied to detection of H₂O₂ and OH molecules in water after different treatments in a cavitation jet. The considerable growth of the ortho-H₂O, OH, and H₂O₂ rotational lines amplitude in cavitation water relatively to distilled water and 1% hydrogen peroxide aqueous solution have been found. This fact was interpreted as the exhibition of H₂O molecules dissociation onto atoms and recombination into OH and H₂O₂. Four-waves mixing spectra fitting gives the evaluation of H₂O₂ rotational line’s amplitude increasing in cavitation water by factor of ～3 in comparison to 1% H₂O₂ aqueous solution.