Chemical Oxidative Degradation of Acridine Orange Dye in Aqueous Solution by Fenton's Reagent |
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Authors: | Chiing‐Chang Chen Ren‐Jang Wu Yi‐You Tzeng Chung‐Shin Lu |
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Institution: | 1. Department of Science Application and Dissemination, National Taichung University, Taichung 403, Taiwan, R.O.C.;2. Department of Applied Chemistry, Providence University, Taichung 433, Taiwan, R.O.C.;3. Department of General Education, National Taichung Nursing College, Taichung 403, Taiwan, R.O.C. |
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Abstract: | Degradation of acridine orange (AO) in aqueous solution by Fenton's reagent (Fe2+ and H2O2) was investigated. The effects of different reaction parameters such as initial AO concentration, pH value of solution, ferrous concentration, hydrogen peroxide concentration, and the presence of chloride ion on the oxidative degradation of AO were investigated. Under optimum conditions, 2 mM H2O2, 0.4 mM Fe2+ and pH 3.0, the initial 0.2 mM AO solution was reduced by 95.8% within 10 min. The primary intermediates of the degradation reaction of AO were identified. The analytical results indicated that the N‐de‐methylation degradation of AO dye took place in a stepwise manner to yield mono‐, di‐, tri‐, and tetra‐N‐de‐methylated AO species generated during the Fenton process. The probable degradation pathways were proposed and discussed. |
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Keywords: | Fenton's reagent Acridine orange Hydroxyl radical N‐de‐methylation |
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