Pollution Research Paper

Vol.31, Issue 1, 2012; Page No.(7-10)

DECOLORIZATION OF CONGO RED, A CARCINOGENIC TEXTILE DYE USING SEMICONDUCTOR MEDIATED PHOTOCATALYSIS

NAVNEET BHULLAR1 AND DHIRAJ SUD

Abstract

In the present study, photocatalytic degradation of congo red (CR), an anionic diazo dye has been investigated in a batch reactor using Titania P-25 (surface area: 50 m2/g) as a photocatalyst under UV light in slurry mode. The rate of decolorization was estimated from residual concentration spectrophotometrically. Similar experiments were carried out by varying pH (2-10), amount of catalyst (0.25-2.00 g/L) and concentration (5-100 ppm). The degradation rate of CR was favorable at pH 4. Optimum value of catalyst dose was found to be 1.5 g/L. The complete degradation of CR was achieved in 2.5h under UV irradiation.

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