Kinetics of the Bicarbonate-Assisted Oxidation of Diethyl Sulfide by Hydrogen Peroxide and Sodium Peroxoborate

Resumo

The kinetics of oxidation of diethyl sulfide (Et₂S) is studied in aqueous solutions of hydrogen peroxide and sodium peroxoborate (Na₂[В₂(О₂)₂(ОН)₄]) in the presence of bicarbonate ions by means of gas−liquid distribution. The kinetics is investigated in a broad range of pH. Data show that the oxidation of Et₂S by sodium peroxoborate in the range of pH 6−12 is mediated by such reactive species as hydrogen peroxide, hydrogen peroxide anions, and mono (B(O₂H)(OH)\(_{3}^{ - }\)) and diperoxoborate (B(O₂H)₂(OH)\(_{2}^{ - }\)) anions. The rate of Et₂S oxidation increases in the presence of bicarbonate, due to the additional reaction pathways mediated by monoperoxocarbonate species.