Azo dyes wastewater is not only high chromatic, strong noxious, but also difficult to degrade and easy to discompose to carcinogenic aromatic amine under deoxidization condition.

• 偶氮染料废水由于其高色度、强毒性、难降解，在还原条件下易分解产生致癌性芳香胺，而被视为现今急待治理的废水之一。