Effective decolorization of polyazo direct dye Sirius Red F3B using persulfate activated with Fe0 aggregate

Persulfate oxidation activated with Fe0 aggregate is a fast and effective process for decoloration of polyazo direct dye Sirius Red F3B (Direct red 80). In 10 min, the four azo links of SRF3B were completely broken down and the true color met the discharge criteria.187