Abstract
The removal of phenol (Co = 100 μM) during electron beam irradiation was studied in pure water and in the presence of HCO 3 − and Br − ions. It was found that the introduction of S 2O 8 2− ions (1 mM), by generating SO 4 − radicals increases the radiation yield of phenol removal. 90% removal of phenol was obtained with radiation doses 600 and 1200 Gy with and without S 2O 8 2− ions respectively. This system induced smaller oxygen consumption with smaller concentration of catechol and hydroquinone found in the solution. HCO 3 − and Br − have an inhibiting effect in the presence as in the absence of S 2O 8 2−. In most cases, the introduction of S 2O 8 2− ions in water radiolysis system can advantageously increase the yield of organic compounds removal by oxidation.
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