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Treatability of Optimized Direct Blue 5 Dye Used in Handmade Paper Unit by Ozonation Method

Author Affiliations

  • 1 Gaya College of Engineering, Gaya, INDIA

Int. Res. J. Environment Sci., Volume 3, Issue (2), Pages 32-35, February,22 (2014)


The present paper highlights the studies with direct blue 5 dyes which is widely used in handmade paper making and textile sector for dyeing purposes. The Central composite design experiment was studied for modeling of ozonation treatment for decolorization of direct blue 5 dye solution. The optimization of parameters ie. Initial concentration of dye solution and time of ozonation treatment on decolorization efficiency of ozonation treatment has been studied. The maximum decolorization was achieved for 125 ppm dye concentration after 60 minutes. The color removal of direct blue with ozone showed best fitting with linear model.


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