The mechanisms and process of acephate degradation by hydroxyl radical and hydrated electron

The degradation process of acephate in aqueous solution with ^{eaq? produced by 60Co-γ irradiation and electron pulse radiolysis was studied in the present paper. In the aqueous solution, acephate reacted with ${\text{e}}_{\text{aq}}^{?}$ and transformed to transient species which can absorb weakly in the wavelength range of 300–400?nm and decay very fast. According to the decay of hydrated electron, the reaction rate constant of ${\text{e}}_{\text{aq}}^{?}$ and acephate is (3.51?±?0.076)?×?109?dm3·mol?1·s?1. The transient species produced in the reaction of eaq?, the concentration of inorganic ions in the products of the reaction of acephate with eaq?. Moreover, there were sulfide in the products of the reaction of acephatewith ${\text{e}}_{\text{aq}}^{?}$. The degradation pathways of acephate by eaq? were also proposed based on the products from GC-MS.}