Degradation Pathways of the Commercial Reactive Azo Dye Procion Red H-E7B under Solar-Assisted Photo-Fenton Reaction
作者： Julia García-Montaño , Francesc Torrades , Leonidas A. Pérez-Estrada , Isabel Oller , Sixto Malato
DOI: 10.1021/ES800536D
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摘要: Reactive azo dye Procion Red H-E7B solutions have been submitted to solar-assisted photo-Fenton degradation. The solution color quickly disappears, indicating a fast degradation of the group. Nevertheless, complete DOC removal was not accomplished, in accordance with presence resistant triazine rings at end reaction. intermediates generated along reaction time identified and quantified. LC−(ESI)−TOF−MS analysis allowed detection 18 aromatic compounds different size complexity. Some them shared same accurate mass, consequently, empirical formula, but appeared chromatographic retention times, evidencing their molecular structures. Heteroatom oxidation products like NH4+, NO3−, Cl−, SO42− also quantified explanations release are proposed. Short chain carboxylic acids detected long as previous step mineralization. A link between disappear...
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