1,4-Dioxane Degradation Using Persulfate Ion and Ag(I) Ion

The kinetics of oxidation of 1,4-dioxane by persulfate ion with Ag + in aqueous solutions at various temperatures and concentra- tions of S2O8 2- , Ag + and H2SO4, were investigated. Experimental results indicate that 1,4-dioxane degradation follows a pseudo-first- order decay model and that reaction rate significantly accelerate by increasing temperature and concentration of oxidant, sulfuric acid and Ag + ions up to 0.46 mM; for the range from 0.46-0.70 mM of Ag + ions the reaction rate remains constant and at higher concentrations the reaction rate decreases. It was possible to degrade approximately 100% of 1,4-dioxane in less than one hour with the following condi- tions: (Ag + ) = 0.46 mM, (H2SO4) = 0.30 M and from a concentration of 25 mM Na2SO4.