Resumo

FELIX-NAVARRO, Rosa María et al. 1,4-Dioxane Degradation Using Persulfate Ion and Ag(I) Ion. J. Mex. Chem. Soc [online]. 2013, vol.57, n.2, pp.127-132. ISSN 1870-249X.

The kinetics of oxidation of 1,4-dioxane by persulfate ion with Ag⁺ in aqueous solutions at various temperatures and concentrations of S₂O₈²⁻, 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 conditions: [Ag⁺] = 0.46 mM, [H₂SO₄] = 0.30 M and from a concentration of 25 mM Na₂SO₄.

Palavras-chave : 1,4-dioxane; degradation; kinetics; persulfate ion; advanced oxidation.

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