Si-FeOOH催化臭氧氧化法降解苯胺

通过掺杂Si提高FeOOH的机械强度,制备无定型Si-FeOOH,并用于催化臭氧氧化降解苯胺。考察了n(Si)∶n(Fe)、Si-FeOOH加入量、溶液p H、初始苯胺质量浓度等因素对苯胺去除率的影响,并研究了SiFeOOH的重复利用效果与铁离子的溶出情况。实验结果表明:Si-FeOOH对臭氧氧化降解苯胺具有明显的催化作用,Si-FeOOH催化臭氧氧化对苯胺的降解效果明显高于单独臭氧氧化和FeOOH催化臭氧氧化;在溶液p H为11、Si-FeOOH加入量为1.0 g/L、n(Si)∶n(Fe)=0.55的最佳降解条件下处理初始苯胺质量浓度为300 mg/L的苯胺溶液,降解10 min后,苯胺去除率可达100%;Si-FeOOH催化剂经5次重复使用后,苯胺的去除率仍高达97.8%,且铁离子的溶出量明显低于FeOOH。

Degradation of Aniline by Catalytic Ozonation with Si-FeOOH

The Si-FeOOH for catalytic ozonation of aniline was prepared by Si doping in order to enhance the mechanical strength. The factors affecting the aniline removal rate were studied. The stability of the reused catalyst and the condition of Fe dissolution were also researched. The experimental results show that：The catalytic effect of Si-FeOOH on aniline degradation by ozonation is significant,since the aniline degradation rate by Si-FeOOH catalytic ozonation is much higher than that by ozonation and that by FeOOH catalytic ozonation;Under the optimum conditions of solution pH 11,Si-FeOOH dosage 1.0 g/L,n（Si）∶n（Fe）=0.55,initial aniline mass concentration 300 mg/L and degradation time 10 min,the aniline degradation rate can reach 100%; After Si-FeOOH has reused for 5 times,the aniline degradation rate is still up to 97.8%,and the Fe dissolved quantity of Si-FeOOH is obviously lower than that of FeOOH.