Electron beam irradiation of citric acid aqueous solutions containing persulfate

Justine Criquet (1) , Nathalie Karpel Vel Leitner (1)

1 Chimie de l'eau et traitement de l'eau

The electron beam irradiation of aqueous solutions of citric acid was studied. The results showed the effectiveness of the degradation of the carboxylic acid by the radiation process. The impact of pH was examined. It was demonstrated that the increase of pH induces a drop of the degradation due to the scavenging of radicals by the inorganic carbon. Moreover the interest of persulfate () addition that induces the formation of sulfate radicals () by the reaction of persulfate with the hydrated electrons was studied. The addition of persulfate leads to a great enhancement of the degradation of the carboxylic acid and also a large increase of the mineralization of the solution. Effectively, it was shown that the particular reactivity of the sulfate radical causes an enhancement of the mineralization yield

Domaines: Catalyse; Chimie organique; Autre

Justine Criquet, Nathalie Karpel Vel Leitner. Electron beam irradiation of citric acid aqueous solutions containing persulfate. Separation and Purification Technology, 2012, 88, pp.168-173. ⟨10.1016/j.seppur.2011.12.006⟩. ⟨hal-00684159⟩