Rapid Degradation of Methyl Orange by Heterogeneous Fenton Process Using Fewo4 Nanocatalyst Prepared by Wet Chemical Route.

Abstract

To remove the hazardous organic adulterants from the wastewater, iron tungstate nanoparticles were prepared by a simple wet chemical route. These nanoparticles characterized to be polydispersed, polycrystalline with irregular spherical morphologies without any notable impurities were used as a catalyst for heterogeneous Fenton reaction, an advanced oxidation process. Their catalytic properties, degradation efficiency, and recyclability were analyzed for methyl orange degradation, a common -reactive azo dye in an acidic aqueous. The rapid fall of absorption peak exhibits the complete degradation of dye within 50 minutes of reaction with discoloration efficiency of ~97% without any additional external exposures such as light or ultrasonic waves. In addition to this, the durability of the FeWO₄ nanoparticles catalyst is proved to be maintained over five catalyst reuse cycles, which strongly suggests that at this present scenario of ecological deterioration, the chosen nanomaterial is one of the apt candidates for azo dye removal by heterogeneous dark Fenton process.