Efficiency of the Photo Fenton Process for Decolorization of Direct Red 81 Dye From the Aqueous Solution

Dehghani, Mansooreh; Mosleheyan, Maryam; Karimiyan, Samaneh; Faramarzi, Zahra; Ansari, Marziye; Shamsedini, Narges; Javaheri, Mohammad Reza; Shahsavani, Samaneh

doi:10.17795/jjhs-34951

Efficiency of the Photo Fenton Process for Decolorization of Direct Red 81 Dye From the Aqueous Solution

Document Type : Research Article

Authors

Mansooreh Dehghani ¹ ^¶

Maryam Mosleheyan ²

Samaneh Karimiyan ²

Zahra Faramarzi ²

Marziye Ansari ²

Narges Shamsedini ²

Mohammad Reza Javaheri ²

Samaneh Shahsavani ²

¹ Research Center for Health Sciences, Department of Environmental Health Engineering, School of Health, Shiraz University of Medical Sciences, Shiraz, IR Iran

² Department of Environmental Health Engineering, School of Health, Student Research Committee, Shiraz University of Medical Sciences, Shiraz, IR Iran

10.17795/jjhs-34951

Abstract

Background: Textile dyes are the largest organic compounds associated with some problems for the environment. Advanced oxidation process is the most effective method for dye removal from wastewater.
Objectives: The aim of this study was to investigate the efficiency of the photo Fenton process for decolorization of direct red 81 (DR 81) dye, and to determine the optimal process conditions.
Methods: This is a cross-sectional study conducted on a laboratory scale. The effective parameters in the photo Fenton process include pH, ferrous sulfate heptahydrate concentration, hydrogen peroxide concentration, initial dye concentration and reaction time. These parameters were studied, and finally analyzed using the Excel software.
Results: According to the obtained results, maximum removal efficiency was 98.1% at pH = 3, concentration of Fe (II) was 10 mg/L, hydrogen peroxide concentration was 50 mg/L, initial concentration of dye was 100 mg/L, and reaction time was 120 minutes. Results showed that increasing the concentration of Fe (II), H₂O₂ and the initial concentration of dye to a certain extent resulted in increasing removal efficiency, then by increasing the concentrations of these parameters, removal efficiency decreased. Results also indicated that increasing a reaction time resulted in increasing removal efficiency.
Conclusions: The photo Fenton method with optimized parameters can be used to conduct high efficiency dye removal in a short period of time and this process is based on hydroxyl radical formation.

Keywords

Industrial Wastewater

Direct Red Dye 81

Photo Fenton Process

Removal Efficiency