Detoxification of diluted azo-dyes at biocompatible pH with the oxone/Co2+ reagent in dark and light processes
نویسندگان
چکیده
Accelerated bleaching and photobleaching of diluted solutions of Methyl Orange and other dyes occur only when Co2+-ions are present in solution mediating oxone (2KHSO5·KHSO4·K2SO4) decomposition. The bleaching of Methyl Orange, Orange II and Methylene Blue dyes in dilute solutions (0.01 mM) proceeds within a few minutes and occurs at biocompatible pH leading to a decrease in the toxicity of the initial solution under simulated daylight radiation. A reduction in the toxicity of 35% was observed at biocompatible pH-values when a solution Orange II ( o o t d w T ©
منابع مشابه
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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