Imperative Role of Oxidation of Diethylthiourea in Dye Wastewater Treatment | Chapter 7 | Current Strategies in Biotechnology and Bioresource Technology Vol. 1
Several properties of thiourea and its derivatives are reported in biological, electrochemical, photochemical and radio-protective fields. This article proposed the use of thiourea derivative in the field of dye wastewater management where the color of the dye was reduced by the application of Diethylthiourea (DETU). For this purpose basic dye methylene green (MG) was selected at laboratory scale to monitor its color reduction by the addition of DETU. It was observed that DETU reacts with methylene green (MG) and reduced it into leuco dye where it oxidized into smaller fragments like urea, nitrate and sulphate. The reaction was favorable in acidic condition. A direct relation in between oxidation of DETU and MG to the concentration of H+ ions was observed through typical kinetics in two acids like HCl and H2SO4. The second order kinetics with respect to HCl and the first order with respect to H2SO4 indicated the protonation of the dye leading to reduction. In alkaline medium, the de...