Optimization of electrochemical decolorization of certain arylazo pyridone dyes | Zendy

Jelena Mirković | Zendy; Nevena Prlainović | Zendy; Gordana Uščumlić | Zendy; Branimir Grgur | Zendy; Dušan Mijin | Zendy

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Optimization of electrochemical decolorization of certain arylazo pyridone dyes

Author(s) -

Jelena Mirković,

Nevena Prlainović,

Gordana Uščumlić,

Branimir Grgur,

Dušan Mijin

Publication year - 2014

Publication title -

journal of the serbian chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.227

H-Index - 45

eISSN - 1820-7421

pISSN - 0352-5139

DOI - 10.2298/jsc140409063m

Subject(s) - chemistry , electrolysis , sodium hydroxide , electrochemistry , sodium hypochlorite , sodium , hypochlorite , chloride , inorganic chemistry , hydroxide , nuclear chemistry , electrode , organic chemistry , electrolyte

Electrocatalytic decolorization of the arylazo pyridone dyes has been investigated in the presence of sodium chloride using DSA Ti/PtOx electrode in the diluted sodium hydroxide. Decolorization can be attributed to the indirect oxidation of the investigated dyes by the electrogenerated hypochlorite formed from the chloride oxidation. Electrochemical decolorization has been investigated for the different sodium hydroxide concentration in the range from 40 mg dm-3 to 4 g dm-3, sodium chloride concentration in the range from 15 to 40 g dm-3, agitation speed in the range from 150 to 500 rpm, currents in the range of 100 to 250 mA, and dye concentration from 5 to 20 mg dm-3. The optimum electrolysis conditions have been suggested. Effect of substituents on the reaction rate has also been studied. [Projekat Ministarstva nauke Republike Srbije, br. OI172013, OI172046

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