Depollution of indigo dye by anodic oxidation and electro-Fenton using B-doped diamond anode

abstract

• Hazardous wastes are generated in the synthesis of dyes and pigments applied in industries. Efficient methods are thus needed to clean wastewaters. Here, we use anodic oxidation and electro-Fenton with B-doped diamond anode to degrade the synthetic dye indigo in aqueous sodium dithionite. Results show the near-complete mineralization of the dye within 80 min at 500 mA. Mineralization was faster by electro-Fenton than anodic oxidation. The second-order rate constant (k) for the reaction of indigo with OH was measured as 4.03 109 M-1 s-1 at pH 3.0 and was compared with the rate constants of reactions between dyes and OH. The results clearly demonstrate that both electro-Fenton and anodic oxidation can be used to depollute dyes in textile effluent with high efficiency and low cost. The main oxidant, OH, being a non-selective reagent, the method could be applied to degrade other organic pollutants. 2013 Springer-Verlag Berlin Heidelberg.

authors

• Sharma, Virender

published proceedings

• ENVIRONMENTAL CHEMISTRY LETTERS

author list (cited authors)

• Diagne, M., Sharma, V. K., Oturan, N., & Oturan, M. A.

citation count

• 24

complete list of authors

• Diagne, Mababa||Sharma, Virender K||Oturan, Nihal||Oturan, Mehmet A

publication date

• March 2014

publisher

• Springer Nature  Publisher

published in

• ENVIRONMENTAL CHEMISTRY LETTERS  Journal

keywords

• Degradation
• Dye
• Electrochemical Processes
• Hydroxyl Radical
• Indigo
• Mineralization

Digital Object Identifier (DOI)

• 10.1007/s10311-013-0437-z

start page

• 219

end page

• 224

volume

• 12

issue

• 1

URL

• http://dx.doi.org/10.1007/s10311-013-0437-z