KINETICS OF REDUCTION OF ANILINE BLUE DYE USINGZERO-VALENT IRON (Fe0)

Authors: Brijesh Pare1*, Anjali Soni2 and V.W. Bhagwat2

1Madhav Science College, Vikram University, Ujjain-456010 (M.P.) INDIA;2School of Studies in Chemistry, Vikram University, Ujjain-456010 (M.P.) INDIA;E-mail: brijesh_pare@hotmail.com

Reductive degradation of dyes by zero-valent metal is a process in which zero valent metals such as Fe, Zn, and Cu are used to treat dye contaminants. These metals are moderate reducing agents and have been found capable of reductive degradation of many organic pollutants.  The reduction of aniline blue by Fe⁰ has been studied in aqueous batch systems. Zero valent iron is current metal of choice because it is readily available, inexpensive, non toxic and a good reducing agent. The aqueous suspension was continuously stirred. The rate of discoloration of the dye was measured by following the change in the absorbance of the dye. Reaction rate has been found to be increased with increase in the mass of Fe⁰, dye, acid and sodium chloride concentrations and decreased with increase in the concentration of EDTA, sodium acetate. On the basis of experimental, FTIR and mass spectra data, a probable mechanism of reduction of aniline blue by Fe⁰ has been proposed.

Keywords : Reduction, Aniline blue, Zero-valent iron