Accelerated photodegradation (minute range) of the commercial azo-dye Orange II mediated by Co3O4/Raschig rings in the presence of oxone
نویسنده
چکیده
Yu Zhiyong a,b, M. Bensimon c, D. Laub d, L. Kiwi-Minsker a, W. Jardim e,f,∗, E. Mielczarski e,f, J. Mielczarski e,f, J. Kiwi a,∗ a Laboratory of Chemical Reaction Engineering LGRC, Station 6, Swiss Federal Institute of Technology (EPFL), Lausanne 1015, Switzerland b Department of Chemistry, Renmin University of China, Beijing 100872, China c EPFL-ENAC-Geolep, Station 18, Brazil d EPFL-SB-CIME, Station 18, Brazil e Institute of Chemistry, UNICAMP, State University of Campinas, Brazil f NPL/CNRS, UMR 7569 LEM, 15 av du Charmois, 54501 Vandoeuvre les Nancy, France
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Bleaching and photobleaching of Orange II within seconds by the oxone/Co2+ reagent in Fenton-like processes
Accelerated bleaching, photobleaching and mineralization of the non-biodegradable azo-dye, Orange II, was observed with oxone in solutions with Co2+-ions. The bleaching rate of Orange II in the dark was found to follow a first-order kinetics with respect to [Co2+] with a rate constant of 20 M−1 s−1. Fitting of the Orange II photobleaching experimental points in the presence of the Co2+/oxone re...
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