Congo Red Research Paper

Photocatalytic Degradation of Congo Red Using Various Nanoparticles: A Review

Kavita R. Desai, C.P. Bhasin

Department of Chemistry, Hemchandracharya North Gujarat University, Patan- 384265, Gujarat (India)

Abstract

The dispute of environmental pollution has become a hot issue in today’s world. The challenging task of the 21st Century is to clean up the contaminants of the environment by environmentally friendly, viable and economically adoptable technologies. Environmental pollution, mainly caused by toxic chemicals like dyes, heavy metals, and other organic compounds etc. These type of toxic materials are not only in the demolition of biodiversity but also the degradation of human health. Pollution levels that are increasing day by day need better developments or technological discoveries immediately. Photocatalytic degradation is a new developing technique for remediation of pollutants using various nanoparticles. The present review speculates on various nanoparticles which are useful for degradation of azo dye- Congo red.

Keywords: Photocatalytic Degradation, nanoparticles, Congo red.

Introduction

The major problem of colorants is the removal of dyes from effluents. In the textile industry, for example, ca.100 billion gallons of wastewater is discharged per annum into the wastewater treatment systems. Unprocessed effluents may be highly colored and, thus, particularly objectionable if discharged into open waters. Their dye

Nanoparticles reveal a number of special properties relative to bulk material and often have unique visible properties because they are small enough to confine their electrons and produce quantum effects. Nanoparticles are widely used in various fields such as photonics, catalysis, electronics and biomedicine due to these unique