Comparison of Different Types of Redox Mediators on the Chemical Reduction of Azo Dye by Sulfide

Abstract:

Azo dyes are extensively used in the industry, resulting in the large amount of wastewater. Redox mediators (R.M.) can accelerate the chemical reduction of azo dye by shuttling electrons from primary electron donors such as sulfide to azo dyes. Three different types of R.M. were studied on the enhancement of chemical reduction of Acid Orange 7. The electron shuttle ability of these types of R.M. with 2.5 mM of initial sulfide concentration at pH 7.5, either dissolved or undissolved type, followed in order by riboflavin, humic acid and activated carbon. The potential engineering application of these R.M. lie on the superior catalytic ability for riboflavin, wide existence in the environment for humic acid, and retaining in the bioreactors all the times for activated carbon.

• Periodical: Advanced Materials Research (Volumes 518-523)
• Pages: 289-294
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.518-523.289
• Online since: May 2012
• Authors: Ning Ding, Jin Gang Huang, Yue Wen, Qi Zhou, Yue Xu
• Keywords: Acid Orange 7, Catalytic Ability, Chemical Reduction, Redox Mediator

References

[1] J.H. Weisburger: Water Research. Vol. 506(1987), p.9

[2] G.M. Shaul, T.J. Holdsworth and C.R. Dempsey: Chemosphere. Vol. 22(1991), p.107

[3] H.M. Rai, J. Bhattacharya and T.K. Singh T.K: Environment Science and Technology. Vol. 35(2005), p.219

[4] P.C. Vandevivere, R. Bianchi and W. Verstraete: Chemistry Technology and Biotechnol. Vol. 72(1998), p.289

[5] A. Stolz: Microbiology and Biotechnology. Vol. 56(2001), p.69

[6] E.S. Yoo: Chemistry Technology and Biotechnology. Vol. 77(2002), p.481

[7] M.G.E. Albuquerque, A.T. Lopes: Enzyme Microbiology and Technology. Vol. 36(2005), p.790

[8] A.B. dos Santos, F.J. Cervantes, J.B. van Lier: Bioresource Technology. Vol. 98(2007), p.2369

[9] A.B. dos Santos, F.J. Cervantes, J.B. van Lier: Microbiology and Biotechnology. Vol. 62-78.64(2004), p.62

[10] A. Keck, J. Klein and M. Kudlich: Vol. 63(1997), p.3684

[11] F.P. Van der Zee: Environment Science and Technology. Vol. 37(2003), p.402

[12] F. J. Cervantes and G. Alberto: Environment Science and Technology. Vol. 44(2010), p.1747

[13] M. Gergo, B. Christophe and S. Frank: Environment Chemical Engineering Journal. Vol. 143(2008), p.293

[14] E.S. Yoo: Chemosphere. Vol. 46(2002), p.925

[15] S.W. Krasner, P. Westerhoff and B. Chen: Environment Science and Technology. Vol. 43 (2009), p.8320

[16] F.P. Van der Zee, I.A.E. Bisschops and V.G. Blanchard: Water Research. Vol. 37(2003), p.3098