纳米四氧化三铁(FMNPs)活化过硫酸盐氧化降解橙黄G的研究

Study on degradation of orange G by persulfate activated by Fe3O4 magnetic nano particles（FMNPs）

采用共沉淀法制备了纳米四氧化三铁催化剂(FMNPs),对其进行了FTIR及XRD表征。以偶氮染料橙黄G(OG)为目标污染物,FMNPs为催化剂,研究了FMNPs用量、过硫酸盐(PS)与OG摩尔浓度比、初始pH值、反应温度等因素对FMNPs活化PS氧化降解OG的影响机理。研究结果表明:最适的反应体系催化剂浓度为0.30g/L;最适的反应体系PS/OG摩尔比为10∶1;FMNPs活化PS体系适合的初始pH值范围非常宽泛,pH值3~9时,都可以有效氧化去除OG。

Fe 3O 4 magnetic nanoparticles(FMNPs) was prepared by coprecipitation,and characterized by FTIR and XRD.The azo dye orange G was the target contaminant,which was oxidized by advanced oxidation technology based on persulfate.The effect of the amount of catalyst concentration,initial pH and concentration ratio between sodium persulfate and orange G over nano-Fe 3O 4 activation was discussed.The results showed that:the optimum concentration of catalyst reaction system was 0.30 g/L.The optimum reaction system PS/OG molar ratio was 10∶ 1.When the pH was in the range of 3 to 9,the orange G could be smoothly degraded.