高铁酸盐溶液降解活性黑KBR的效果及机理

摘要

The degradation efficacy of reactive black KBR with ferrate solution has been studied,and degradation mechanism has been analyzed by UV-Vis and FFIR methods.The experimental results show that ferrate solution has effects of good decolorizing efficacy and fast decolorizing velocity on KBR.When the optimal range of pH ≤ 8,dosage of Fe (Ⅵ) 25 mg/L,and reaction time 60 min,the effects of decolorizing rate and COD removing rate on KBR are 80.3％ and 62.5％,respectively.During oxidation degradation process,Fe (Ⅵ) and C1O-in ferrate solution have synergistic effect.The analysis by UV-Vis and FTIR methods shows that during the degradation process,the azo bonds of dye molecules are damaged,benzene ring and heterocyclic of dye molecules are opened,dye macromolecules could be oxidized to small molecule intermediates.%研究了高铁酸盐溶液对活性黑KBR的降解效果,并采用UV-Vis、FTIR对降解机理进行分析.结果表明,高铁酸盐溶液对KBR脱色效果较好,脱色速率较快,最佳pH范围≤8.Fe(Ⅵ)最佳投加量为25 mg/L,反应60 min时,对KBR的色度和COD去除率分别为80.3％、62.5％.在氧化降解过程中,Fe(Ⅵ)和C1O-表现出协同作用.UV-Vis和FTIR分析表明,降解过程中染料分子的偶氮键被破坏,苯环和杂环被打开,染料大分子被氧化为小分子中间产物.