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Influence of persulfate ions on the removal of phenol in aqueous solution using electron beam irradiation
Sahidou O B Boukari1, Fabien Pellizzari, Nathalie Karpel Vel Leitner
1Laboratoire de Chimie et Microbiologie de l'Eau, UMR CNRS 6008) Université de Poitiers, Ecole Nationale Supérieure d'Ingénieurs de Poitiers, 40 Avenue du Recteur Pineau, 86022 Poitiers Cedex, France.
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(2)O(8)(2-) ions (1mM), 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(2)O(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(2)O(8)(2-). In most cases, the introduction of S(2)O(8)(2-) ions in water radiolysis system can advantageously increase the yield of organic compounds removal by oxidation.
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