TY - JOUR
T1 - Effect of dye auxiliaries on color and COD removal from simulated reactive dyebath effluent by electrocoagulation
AU - Kabdaşli, I.
AU - Vardar, B.
AU - Arslan-Alaton, I.
AU - Tünay, O.
PY - 2009/5/1
Y1 - 2009/5/1
N2 - 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.
AB - 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.
KW - Aluminum and stainless steel electrodes
KW - Color and COD abatement kinetics
KW - Color and COD removals
KW - Electrocoagulation
KW - Simulated reactive dyebath effluent
KW - Textile dyebath auxiliaries
UR - http://www.scopus.com/inward/record.url?scp=60949091120&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2008.08.006
DO - 10.1016/j.cej.2008.08.006
M3 - Article
AN - SCOPUS:60949091120
SN - 1385-8947
VL - 148
SP - 89
EP - 96
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
IS - 1
ER -