It can be infered that the decoloration of azo dye molecules is the co-effect of the selective chemical absorption and the oxidation-deoxidation effect on the surface of iron oxyhydroxides.

• 由以上结果推论：两种偶氮染料的脱色是选择性的化学吸附与氧氢氧化铁界面的氧化还原降解共同作用的结果。