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- W2029996944 abstract "The cathodic reduction and anodic OH-mediated oxidation of the azo dye Reactive Black 5 (RB5) have been studied potentiostatically by using undivided and divided cells with a Ni-polyvinylchloride (Ni-PVC) composite cathode and a Ni wire mesh anode. Solutions of 50–100 cm3 of 20–80 mg dm−3 RB5 in 0.1 mol dm−3 KOH were degraded to assess the effect of electrolysis time and electrode potentials on the infrared and absorbance spectra, as well as on the decay of the total organic carbon and chemical oxygen demand. Reversed-phase high performance liquid chromatography (RP-HPLC) with ion-pairing and diode array detection (ion pair chromatography), along with coupling to tandem mass spectrometry (LC–MS/MS), were used for the identification of the aromatic degradation by-products and monitoring their time course. These analyses revealed the progressive conversion of the RB5 dye to simpler molecules with m/z 200, 369.5 and 547 under the direct action of the electron at the cathode and the formation of polar compounds such as alkylsulfonyl phenol derivatives with m/z 201, 185 and 171 by the OH mediation at the anode. From these results, the electrochemical reduction and oxidation pathways for the RB5 dye were elucidated." @default.
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- W2029996944 date "2012-01-01" @default.
- W2029996944 modified "2023-10-18" @default.
- W2029996944 title "Electrochemical reduction and oxidation pathways for Reactive Black 5 dye using nickel electrodes in divided and undivided cells" @default.
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- W2029996944 doi "https://doi.org/10.1016/j.electacta.2011.10.047" @default.
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