Potentiochromic Reduction of methylene Blue in Acidic Medium at Carbon Electrode

The study has focused on the development of a treatment technique and method for dye wastewater, such as an oxidation reduction process. The potentiochromic study of voltage sensitive methylene blue dye was performed in acidic medium at carbon electrodes. It was found that the carbon electrode shows sensitivity and durability for the retardation of dye. From the results it is revealed that the time of retardation decreases with increasing applied potential. The spectral study of methylene blue dye shows that as the applied potential increases the absorbance of dye content also decreases linearly and the color intensity faded out with due course of time and finally to a colorless solution. The effect of concentration of dye shows the direct relation of concentration and retardation time. The extent of retardation of the large decrease in absorbance was observed in 6.0×106 M solution at different applied potentials. It was found that as the dilution of methylene blue was increasing the λmax was slightly shifted linearly with higher wavelength which shows a bathochromic shift. The kinetics of the retardation of basic blue dye were found to be first order with respect to concentration of dye at room temperature. Talat Mahmood, Arif Zubair, Iffat Mahmood, Sana Mustafa, Ahmad Ali – Potentiochromic Reduction of methylene Blue in Acidic Medium at Carbon Electrode EUROPEAN ACADEMIC RESEARCH, VOL. I, ISSUE 5/ AUGUST 2013 702