Effect of the Operating Parameters on the Discoloration of the Black Azo Dye Blue Naphtol (NBB) by the Fenton Process

Numéro de la revue: Volume 26 , Numéro 2

Auteurs: Salah Meddah1,2 , Imene Djeghader 1,3 & Mohamed El Hadi Samar1,2

1Department of Process Engineering, Faculty of Engineering Sciences, Po Box 12, Badji Mokhtar University 23000, Annaba, Algeria.
2Laboratory of Environmental Engineering, Department of Process Engineering, Badji Mokhtar University, P.O. Box 12, 23000 Annaba, Algeria
3Laboratory of Organic Synthesis- Modeling and Optimization of Chemical Processes, Badji Mokhtar University, P.O. Box 12, 23000, Annaba, Algeria.

 

ABSTRACT

The effluents loaded with synthetic and natural dyes are difficult to remove; therefore it becomes necessary to find alternative methods to treat dyes that are recalcitrant to conventional treatments. Nowadays, Advanced Oxidation Processes (AOPs) are increasingly used and Fenton process is one of these technologies. In this work, the discoloration of Naphtol Blue Black (NBB) by Fenton process was studied. The Effects of operating parameters such as the nature of the acid and pH, the concentrations of hydrogen peroxide, iron and dye, temperature and stirring speed, the presence of salts, anions, metallic cations and the influence of real matrices, were examined. For a initial concentration of NBB equal to 30 mg/L, an efficiency of 98 % was obtained under pH = 3, SS = 250 rpm and [H2O2] = 55 mg/L.

Keywords

Water treatment; Fenton Process; Discoloration; Azo dye.