Decolorization of organic dye (NBB) using Fe(III)P₂W₁₂Mo₅/H₂O₂ system

ABSTRACT

This study evaluates the potential of Fe(III)P₂W₁₂Mo₅/H₂O₂ system in the decolorization of one common industrial azo dye, naphthol blue black (NBB). The effects of different parameter’s dye decolorization were investigated. The studied parameters were: the initial pH, the initial H₂O₂ concentration, the catalyst mass, and the initial dye concentration. The optimal conditions for a maximum discoloration efficiency (100%) are: pH: 3, [NBB]₀ = 10 mg/L, Catalyst mass : 0.3 g, [H₂O₂]₀ = : 2 m M. The spectrophotometric analysis indicated that the decolorization of the azo dye with Fe(III)P₂W₁₂Mo₅/H₂O₂ was due to the reduction of the azo bonds. This study verifies the viability of the use of Fe(III)P₂W₁₂Mo₅/H₂O₂ in the decolorization of NBB.

Keywords:

• Dye decolorization
• Naphthol blue black (NBB)
• Water treatment
• Oxidation