The Radiation Chemistry of Deaerated Aqueous Vinylpyridine Sulphate -· Ferric Sulphate Solutions

The mechanism of radiation-chemical reactions of deaerated aqueous vinylpyridine sulphate solutions irradiated with Co-60 gamma rays in the presence and absence of ferric sulphate have been investigated. The effects of vinylpyridine sulphate concentrations and suphuric acid on G(H202) and including ferric sulphate on G(H2) and G(Fe2+) have been measured. A maximum value in G(H202) at vinylpyridine sulphate concentrations about 4·10-a M was observed, but only a plateau was obtained in G(H2) at vinylpyridine sulphate concentrations below 10-a M. High vinylpyridine sulphate and sulphuric acid concentrations decrease G(H202) and G(H2), which is decreased by ferric sulphate too, but its efficiency depends on the sulphuric acid concentration. G(Fe2+) increases to a maximum value with increasing vinylpyridine sulphate and ferric sulphate concentrations, but decreases with increasing sulphuric acid concentrations. From the experimental results G(H) and G(OH) values were calculated. These and other results in this system are discussed to explain the mechanism of radiation-chemical reactions