Comparison of TiO2 catalysis and Fenton’s treatment for rapid degradation of Remazol Red Dye in textile industry effluent

Abstract

The contamination of water bodies by toxic industrial effluents is a serious threat to environment and the exposed organisms. The treatment of carcinogenic azo dyes in wastewater of grossly polluting textile industry is a major challenge considering the persistent nature of chemical dyes against biological treatment. The present study explores efficacy of advanced oxidation processes-photocatalysis and photo-Fenton, towards degradation of Remazol Red dye in the textile industry effluent. It was observed that both processes can completely remove the colour and approximately 85% mineralization of the dye within reaction time of 60 min and 8 min, respectively. The economic analysis placed photo-Fenton as a cost-effective method with treatment cost of approx. 0.0090 US $/litre of wastewater containing Remazol Red dye. Although, Photocatalysis was relatively slow, it is substantially effective in removal/degradation of colour from textile effluent against the biological treatment. The study concludes that photo-Fenton and Photocatalysis are cost-effective and substantial treatment options for removal of toxicity arising from coloured textile effluents.

Visible Light-Driven Organic Pollutant Removal Using Fe-Based Photocatalysts Supported by Wheat Straw Biochar

“…Photocatalysis has been considered as a viable approach to remove chemically stable compounds, due to its ability to generate radical oxidative species (ROS). Extensive research has focused on designing and refining metal based photocatalysts, with an emphasis in developing a greener catalyst with metal dopants to enhance its photocatalytic efficiency [10,11].…”

“…Furthermore, the porous nature of BC enables a higher number of photocatalysts to be deposited, increasing the number of active sites compared to conventional photocatalysts. It is imperative that the use of green resources available in the field of photocatalysis has been carried out at a rapid pace to enhance the sustainability of the technology [10,25]. Recent work on the development of BC derived from algae on titania nanotube arrays showed promising result in removing methylene blue (MB), where an improvement in charge carrier separation, inducing multistep charge transfer, and electron transfer have been identified as the main contributor to the improvement in photoactivity [26].…”

Sustainable biodegradation of textile dye reactive blue 222 by the novel strain Enterobacter CU2004, isolated from the industrial waste: A design of experiment based optimization study and characterisation of metabolites

“…Textile industries are the leading consumers of these dyes and release unused dyes frequently at a 15% concentration into water bodies [5][6][7] Globally, it is estimated that approximately 280,000 tons of textile dyes are discharged into water bodies annually in the untreated form [8,9]. Removal and degradation of these dyes in the industrial effluent is one of the major environmental challenges and therefore, gaining more attention over the past few decades [10,11]. Even at a lower concentration of 1 ppm, these dyes can affect the nature and ecosystem of water.…”

Synthesis, Characterization and Photocatalytic Activity of CoFe2O4/Fe2O3 Dispersed in Mesoporous KIT-6

“…Specifically, some studies show different photocatalysts in the degradation of red remazol dyes; however, there is a lack of studies on materials such as espinels ferrites. It is worth pointing out that remazol dyes are comparatively less reactive than other dyes, making them more stable in water and more difficult to degrade [ 14 , 15 , 16 , 17 ].…”