Abstract
Abstract The cobalt (II)–triethylamine (TEA) complex was found for the first time to degrade orange II with remarkable high activity using H2O2 as an oxidant under mild conditions. The effects of several parameters such as the types of chelating agents, the concentrations of Co2 +, TEA and H2O2, and the temperature on the degradation efficiency of the complex were investigated. It was suggested by the electron spin resonance spin-trapping technologies that the produced hydroxyl radicals were to be responsible for the dye decolorization. This study can provide us a simple, effective and economic system ideal for the treatment of toxic and nonbiodegradable azo dye.
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