A Fixed-Bed Mini Reactor for the Removal of Dye and Organic Pollutant from Synthetic Waste Water Using Graphene Oxide-Coated Stones

Abstract

Increase in technologies have also caused increase in environmental issues. One of the major problems is the water pollution due to continuous discharge of effluents from textile and other related industries. In this study, a low- cost, lab-scale and environmentally compatible adsorption system had been developed for removal of crystal violet dye and organic pollutant from the waste water. A Fixed-bed mini reactor using graphene oxide-coated stones was fabricated using 50mL burette and operated under ambient conditions. A synthetic waste water was prepared containing crystal violet dye (10mg L^-1) and glucose (200 mg L^-1) to simulate mixed industrial effluents. Titration based redox method had been used to evaluate the efficiency of dye removal and organic pollutant. The results achieved a maximum crystal violet removal efficiency of 93% and COD reduction 77%. The effect of time and reusability had also been demonstrated and it showed a stable bioreactor performance. Thus, the results indicate that GO-CS based reactor offers a simple, stable, inexpensive and environmentally compatible adsorption system for the removal of dye-organic mixed waste water. The work had been novel. And not performed in a decade before.