The degradation of Crystal Violet was performed by catalytic ozonation using Fe/activated carbon as catalyst, and a higher removal of Crystal Violet was achieved compared to ozonation alone. The decolorization rate increased with an increase in ozone gas flow rate from 200 to 600 mL/min, an increase in ozone dose from 1.68 to 4.44 mg/min, an increase in pH from 4 to 10, and an increase in catalyst amount from 1.0 to 2.5 g/L. But further increase in catalyst amount would result in an unpronounced increase of decolorization rate. Temperature had little effect on the decolorization rate in the range of 25-45�C. The main intermediates were separated and identified by gas chromatography-mass spectrometry (GC-MS) technique and a plausible degradation pathway of Crystal Violet was proposed. Toxicity test with Daphnia magna showed that the acute toxicity decreased during the catalytic ozonation process.

Catalytic ozonation of Crystal Violet in aqueous solution with Fe-activated carbon catalyst

248th National Meeting (2014)

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