DEVELOPMENT OF AN ENVIRONMENT FRIENDLY METHOD TO REMOVE THE COLORED COMPONENTS FROM INDUSTURIAL WASTE WATER

Abstract

Nowadays, synthetic dye context is a vital component in the textile and dyeing industries.The garr ient factories in the free trade zone that are discharging dyes and other colouredcornpounds into waterways pollute the environment. In this project, attempts were made todesign an environment friendly methodology to degrade Azo dyes by means of Eco--efficient techniques. Optimum conditions were evaluated for the redox-degradation of theAzo dyes and some of the dyes that are used in garment industry. The fidelity of theproposed mechanism was confirmed by the spectroscopic and GC analyses. As a reducingagent, metallic iron has fulfilled all the requirements that are prescribed for green chemicalconcepts.

The results presented in this report clearly demonstrate that Anthroquinone-2-sulphonicacid is a powerful catalyst, capable of accelerating the reaction rate by orders ofmagnitude. The powdered form of charcoal amalgamated with metallic iron hasfacilitated as a better substrate to adsorb the dye component improving the contacts ofreactant molecules with the catalyst and dye molecules. The experimental results revealedthat pH 4 is the optimum condition for the redox degradation of the dye, which isconfirmed by electrochemical, and thermodynamic calculations. The elevation of thereaction temperature has accelerated the reaction by several orders of magnitude. Todemonstrate the applications in real world a continuous flow reduction apparatus wasdesigned and constructed.