Abstract

Ozonation of three industrial dyes was examined in batch studies with single- and multi-solute dye solutions. The kinetics of dye oxidation were controlled by gas transfer limitations and oxidation took place at the gas-liquid interface. Competition by dye molecules for the gas-liquid interface and relative chemical reactivity resulted in the preferential oxidation of selected dyes in mixtures of three dyes and auxilliary compounds typically found in dye-bath wastewaters.

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