Decolourization of Synthetic Wastewater Related to the Textile Industry Using Photo-Fenton

Abstract

The artisanal textile industry plays a vital role in the economy by providing a wide variety of products. However, this sector generates large quantities of wastewater containing a diversity of organic compounds, including dyes that, when released into the environment, contribute significantly to water pollution. In this research, samples of synthetic wastewater containing green aniline were subjected to decolourization using the photo-Fenton process. Synthetic textile wastewater was prepared at a concentration of 40 mg/L, and a calibration curve was established. During the treatment, ferrous sulfate (at concentrations of 50 and 150 mg/L) and H2O2 (at concentrations of 0.5 and 1.0 g/L) were added to 1 L of the synthetic effluent in a stirring medium (at 1000 rpm) and exposed to solar radiation for 1, 2, or 3 hours, while maintaining a pH of 3. To quantify the degree of decolourization, absorbance was measured at the beginning and end of the treatment using a colourimeter. The optimal conditions for Fe2+ concentration, H2O2 concentration, and treatment time, with an initial concentration of 40 mg/L, were found to be 150 mg/L, 1.0 g/L, and 3 hours, respectively. Under these conditions, the percentage of decolourization reached 97.546%. The study demonstrated that the concentration of Fe2+ and treatment time, as well as the interaction between Fe2+ concentration, H2O2 concentration, and treatment time, significantly influenced the degree of decolourization. Conversely, the concentration of H2O2 and other interactions did not exhibit significant influence.

Keywords

• decolorization
• synthetic wastewater
• textile industry
• photo-fenton