THE RADIATION-INDUCED DECOMPOSITION OF MILLIMOLAR CONCENTRATIONS OF HYDROGEN PEROXIDE IN AERATED PURE WATER

摘要

The decomposition of hydrogen peroxide in aerated "pure water" was studied as a function of dose and initial hydrogen peroxide concentra-tion, (H202)o, in the 1 to 100 millimolar concentration region. Irra-diations were performed with a 2000-curie Co60 source at a dose rate of 12.8 kilorads per minute. The decomposition of hydrogen peroxide vas found to follow first-order kinetics with respect to peroxide in the 1 to 100 millimolar concentration range. The specific peroxide decom¬position rate constant, K1, was observed to decrease with an increase in initial peroxide concentration. The decomposition yield of hydrogen peroxide, G -(H2O2), at a given dose was found to increase significantly with increasing initial peroxide concentration and to be proportional to the square root of the initial peroxide concentration up to about 40 millimolar peroxide. The peroxide decomposition yield for a given ini¬tial peroxide concentration was observed to decrease continually during irradiation. The rate of decrease was found to be greater for higher initial concentrations of peroxide.