Decolorization of textile dye CI Basic Yellow 28 with electrochemically generated active chlorine

Mijin, Dušan Ž.; Ivić, Milka L. Avramov; Onjia, Antonije; Grgur, Branimir N.

doi:10.1016/j.cej.2012.07.091

Cited by 45 publications

(13 citation statements)

References 21 publications

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“…It was shown earlier that an increase of pH is evident during electrochemical decolorization. 23 The increase in the solution pH decreases the reaction rate, which could be connected with the dissociation of hypochlorous acid to hypochlorite. Here, the initial pH was 10.3 and there was almost no change in the pH value during the reaction.…”

Section: Effect Of Applied Current and Phmentioning

confidence: 99%

“…The initial sodium chloride concentration and the applied current value were taken according to the results in a previous paper. 23 During the electrochemical treatment, at certain times, 3 cm 3 of reaction solution was taken for instant UV-Vis analysis. The reaction rate of dye 1 decolorization could be given by the kinetic expression:…”

Section: Reaction Kinetics and Uv-vis Spectramentioning

confidence: 99%

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Optimization of electrochemical decolorization of certain arylazo pyridone dyes

Mirković

Prlainović

Ušćumlić

et al. 2014

JSCS

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Electrocatalytic decolorization of arylazo pyridone dyes was investigated in the presence of sodium chloride using a DSA Ti/PtO x electrode in dilute sodium hydroxide. The decolorization could be attributed to the indirect oxidation of the investigated dyes by electrogenerated hypochlorite formed from the chloride oxidation. The electrochemical decolorization was investigated for the different sodium hydroxide concentrations in the range from 40 mg dm -3 to 4 g dm -3 , sodium chloride concentrations in the range from 15 to 40 g dm -3 , currents in the range of 100 to 250 mA and dye concentrations from 5 to 20 mg dm -3 . The optimum electrolysis conditions are suggested. The effect of substituents on the reaction rate was also studied.

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Section: Effect Of Applied Current and Phmentioning

confidence: 99%

Section: Reaction Kinetics and Uv-vis Spectramentioning

confidence: 99%

Optimization of electrochemical decolorization of certain arylazo pyridone dyes

Mirković

Prlainović

Ušćumlić

et al. 2014

JSCS

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“…The absorption band at 300 nm also corresponds to a (   * ) transition. The third absorption band at 436 nm is assigned to a (n   * ) transition [38]. The decrease of absorption peak actually indicates a decolorization of BY 28 dye.…”

Section: Uv-vis Spectramentioning

confidence: 99%

“…This dye is azomethine dye and, as such, is less reactive since the electrophilic attack of the chloronium ion on the nitrogen atom in BY28 is hindered by the conjugation which exists in the molecule (Figure 1). Due to this low reactivity of BY28 [38], only reaction at 40 o C was recorded and compared to RO16 and AB111 decolorisation under the same reaction conditions (Figure 6). It can be seen that the reactivity order is in accordance with the aforementioned, i.e.…”

Section: Dye Decolorisation Using Only Hypochloritementioning

confidence: 99%

Influence of microwave irradiation on hypochlorite decolorisation of synthetic dyes

Mijin¹,

Dabić²,

Mirković³

et al. 2016

Zas Mat

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“…Mijin et al (2012) used UV-vis spectrophotometry, ion chromatography, organic carbon analysis and cyclic voltammetry, to investigate reaction of the indirect electrochemical decolorization of cationic textile dye Color Index (CI) Basic Yellow 28 (BY28) with electrochemically generated "active chlorine". The influence of the basic operational parameters such as applied current, initial concentration of NaCl and BY28 and pH value on decolorization was determined.…”

mentioning

confidence: 99%