Abstract

A. Kistan^1,2, V. Kanchana³, L. Sakayasheela², J. Sumathi², A. Premkumar², A. Selvam² and Thaminum Ansari A⁴

DOI : http://dx.doi.org/10.13005/ojc/340250

The photo-catalytic activity of TiO₂ catalysis is very much useful to removal of color from dye industry effluent from tanneries, textile industry, and Ink factory. The Novelty of this study, we have found on a very simple method when to compare the photo catalytic activity of Titanium dioxide in different Concentration of two different Organic dyes (Organic dyes of Methyl Orange and Methyl Red) which were not compared in the past studies. This method can be carried out in a normal chemical lab and easy way with limited use of chemicals and simple lab equipment’s. Dye solutions having pigments with high photo catalytic activity lose their color within several minutes of UV-Visible radiation exposure (optical windows 160W (Hg lamp medium pressure)) where as, dye solutions having UV-stable TiO₂ would not degrade within several hours of radiation exposure. For both dyes (Methyl Orange and Methyl Red) the color started fading quickly when the light radiation was passed continuously for a long time (15 to 120 minutes). It was also found that concentration of both dyes decreased, with time or the degradation increased. The effect of varying the dye concentration increases with degradation rate decreases. The rate constant value undergoes some marginal decreases at pH = 4.2 when the Methyl Orange dye concentration was increased. The degradation Measurements were carried out using SHIMADZU UV-Visible 1601 spectrometer in the range of wave length from 200nm to 700 nm aid of Glass cell (made of Quartz) with 10mm optical path length.

Organic Dyes; Hg lamp; pH; Methyl Orange (MO); Methyl Red (MR); Degradation

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