Kinetics of oxidation of azo dyes by CrVI using oxalic acid in absence and presence of micelle forming surfactants

Abstract

Kinetic studies on the oxidation of aromatic azo compounds Ponceau-S and Fast Sulphon Black-F using chromic acid catalysed by oxalic acid was investigated in absence and presence of cationic surfactant (CTAB) and anionic surfactant (SDS). An appreciable rate constant obtained from the kinetic investigation revealed the feasibility of the reaction. Mechanism, already reported has been found consistent with the experimental findings. The oxidation reaction of both the dyes were found to be inhibited in presence of CTAB and showed no effect in presence of SDS