Indirect Electrochemical Reduction of Indigo and Dyeing

Abstract:

The method of electrochemical reduction utilizes electrons as agent to achieve the reduction of indigo, vat dyes and pollution emissions, as well as the recycling of electrolyte. In this study, Ca²⁺-Fe³⁺-triethanolamine (TEA) redox system was used as the mediator to achieve the indirect electrochemical reduction of indigo. The optimization of parameter was analyzed by reduction efficiency (RE) and current efficiency (CE). The result showed that indigo could be reduced by electrochemical method and the best optimization recipe was 20 g/L NaOH + 5 g/L Fe₂(SO₄)₃ + 30 g/L TEA + 5 g/L Calcium gluconate + 3 g/L indigo in 1 A·dm^-2 current density at 50°C. This work suggested that Ca²⁺-Fe³⁺-TEA redox system in reduction of indigo was an effective way with higher CE (75.9 %).

• Periodical: Key Engineering Materials (Volume 773)
• Pages: 379-383
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.773.379
• Online since: July 2018
• Authors: Xiao Dong Tan, Wei Xiong*, Jin Zhang, Jie Xu, Chang Hai Yi
• Keywords: Ca²⁺-Fe³⁺- TEA Redox System, Dyeing, Electrolysis, Indigo, Indirect Electrochemical

References

[1] M. Klessinger, The origin of the colour of indigo dyes. Dye. Pigm. 3(2-3) (1982) 235-241.

[2] A. H. Said, W. Miled, N. Ladhari, et al. New Prospects in the Electrochemical Dyeing of Indigo. J. Appl. Sci. 8(13) (2008) 2456-2461.

DOI: 10.3923/jas.2008.2456.2461

[3] A. Roessler, X. Jin. State of the art technologies and new electrochemical methods for the reduction of vat dyes. Dye. Pigm. 59(3) (2003) 223-235.

DOI: 10.1016/s0143-7208(03)00108-6

[4] M. A. Kulandainathan, A. Muthukumaran, K. Patil, et al. Potentiostatic studies on indirect electrochemical reduction of vat dyes. Dye. Pigm. 73(1) (2007) 47-54.

DOI: 10.1016/j.dyepig.2005.10.007

[5] A. Vuorema, P. John, M. Keskitalo, et al. Electrochemical and sonoelectrochemical monitoring of indigo reduction by glucose. Dye. Pigm. 76(2) (2008) 542-549.

DOI: 10.1016/j.dyepig.2006.06.044

[6] T. X. H. Le, M. Bechelany, S. Lacour, et al. High removal efficiency of dye pollutants by electron-Fenton process using a graphene based cathode. Carbon, 94 (2015) 1003-1011.

DOI: 10.1016/j.carbon.2015.07.086

[7] W. Miled, N. Ladhari, A. H. Said, et al. Indirect electrochemical reduction of vat dyes process optimization for indigoid, anthraquinonic and polycyclic vat. Int. Rev. Chem. Eng. Rap. Commun. 2(1) (2010) 3-9.

[8] R. B. Chavan, J. N. Chakraborty. Dyeing of cotton with indigo using iron(II) salt complexes. Colorat. Tech. 117(2) (2006) 88-94.

DOI: 10.1111/j.1478-4408.2001.tb00340.x

[9] A. Roessler, D. Crettenand. Direct electrochemical reduction of vat dyes in a fixed bed of graphite granules. Dyes Pigm. 63(1) (2004) 29-37.

DOI: 10.1016/j.dyepig.2004.01.005

[10] H. F. Mansour. Environmental production of fashion colors from natural dyes. Int. J. Phys. Sci. 8(16) (2013) 670-683.

DOI: 10.5897/ijps12.665

[11] B. Thomas, T. Aurora. Iron-complexes of bis(2-hydroxyethyl)-amino-compounds as mediators for the indirect reduction of dispersed vat dyes – Cyclic voltammetry and spectroelectrochemical experiments. J. Electroanal. Chem. 591(1) (2006) 118-126.

DOI: 10.1016/j.jelechem.2006.03.040

[12] T. Bechtold, A. Turcanu. Fe3+ --gluconate and Ca2+ -Fe3+ --gluconate complexes as mediators for indirect cathodic reduction of vat dyes – Cyclic voltammetry and batch electrolysis experiments. J. Appl. Electrochem. 34(12) (2004) 1221-1227.

DOI: 10.1007/s10800-004-1707-z

[13] T. Bechtold, E. Burtscher, A. Turcanu. Ca2+–Fe3+–D-gluconate-complexes in alkaline solution. Complex stabilities and electrochemical properties. J. Chem. Soc: Dalton Trans, 43(13) (2002) 2683-2688.

DOI: 10.1039/b202086f

[14] Y. Xu, H. Li, C. Chu, et al. Indirect Electrochemical Reduction of Indigo on Carbon Felt: Process Optimization and Reaction Mechanism. Ind. Eng. Chem. Res, 53(26) (2014) 10637-10643.

DOI: 10.1021/ie500603y