Degradation of Acidic Congo Red via Activated Potassium Persulfate by Sunlight and Ferrous Ion

Abstract:

t was discovered that sunlight/Fe²⁺/S₂O₈^2- method is superior to UV/Fe²⁺/S₂O₈^2-method when we treated water samples of acidic Congo red .Congo red dye was applied in activated potassium persulfate by sunlight/ultraviolet and ferrous ion system investigation. It showed efficient sunlight/ultraviolet activated degradation of acidic Congo red, and the activation of sunlight was better than that of ultraviolet. The effect of pH value, Fe²⁺ and S₂O₈^2- concentration on the degradation of Congo red were investigated. The result indicated that when pH was 3.0, [Fe²⁺] was 0.42mmol/L, [S₂O₈^2-] was 74.0mmol/L, the decolouring ratio of acidic Congo red were 91.0% and 100% respectively after 5min and 60min of reaction times, the TOC removal ratio was 80.4% after 120min.

• Periodical: Advanced Materials Research (Volumes 726-731)
• Pages: 2146-2150
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.726-731.2146
• Online since: August 2013
• Authors: Ming Zhang*, Zheng Jiang Zhu, Jun Mei He, Nai Dong Zhang
• Keywords: Congo Red, Introduction, Peroxydisulfate, Sulfate Radical Anion, Sunlight

References

[1] House D.A. J.Chem.Rev Vol.62 (1962) ,p.185.

[2] Chen.X.Y,Yang X and Wang P. Modern. Chemical .Industry，Vol.29(2009),p.13.(In Chinese).

[3] Anipsitakis.G.P ,Dionysios D. D. Environ. Sci. Technol. Vol. 38(2004),p.3705.

[4] Lau.T.K,Wei.C and Graham N.J. Environ.Sci.Technol. Vol. 41(2007),p.613

[5] Wei.C ,Lau.T and Fung S.C. J.Agric.Food.Chem Vol.54(2006),p.10047.

[6] Liang.C.J ,Bruell.C.J and Marley M.C. J. Chemosphere . Vol.55(2004),p.1213.