Effect of dye auxiliaries on color and COD removal from simulated reactive dyebath effluent by electrocoagulation

I. Kabdaşli*, B. Vardar, I. Arslan-Alaton, O. Tünay

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

104 Citations (Scopus)

Abstract

In this paper, application of electrocoagulation using common electrode materials (aluminum and stainless steel) to a simulated reactive dyebath effluent was investigated. A mixture of dyes and auxiliary chemicals rather than a single dyestuff was employed to reflect actual reactive dyeing conditions. The experimental study focused on the effect of individual reactive dyebath components on color and COD removal rates and efficiencies by electrocoagulation. Electrocoagulation using stainless steel electrodes was found to be more effective particularly for color abatement. Na2CO3 significantly reduced the process efficiency both in terms of color and COD removals. An adverse effect on COD removal efficiency was also observed for the sequestering agent. On the other hand, increasing the NaCl concentration not only enhanced color and COD removal efficiencies but also compensated the adverse effects of Na2CO3 and sequestering agent on the electrocoagulation process. The dominant mechanism of color and COD removals from reactive dyebath effluent by electrocoagulation seemed to be coagulation and adsorption at pH values above 11.

Original languageEnglish
Pages (from-to)89-96
Number of pages8
JournalChemical Engineering Journal
Volume148
Issue number1
DOIs
Publication statusPublished - 1 May 2009

Funding

The authors thank Dr. İzzet Alaton for supplying the reactive dyestuffs and dye auxiliary chemicals. The present work was financially supported by TUBA (The Turkish Academy of Sciences) under the “Young Scientists Scholarship Program” and İstanbul Technical University Scientific Research Project Foundation.

FundersFunder number
TUBA
Türkiye Bilimler Akademisi

    Keywords

    • Aluminum and stainless steel electrodes
    • Color and COD abatement kinetics
    • Color and COD removals
    • Electrocoagulation
    • Simulated reactive dyebath effluent
    • Textile dyebath auxiliaries

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