Degradation of C.I. Acid Orange 7 by the advanced Fenton process in combination with ultrasonic irradiation.
Degradation of C.I. Acid Orange 7 by the advanced Fenton process in combination with ultrasonic irradiation.
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DOI：
10.1016/j.ultsonch.2008.09.005
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发表时间：
2009-03
影响因子：
8.4
通讯作者：
Hui Zhang;Jianhua Zhang;Chunyang Zhang;Fang Liu;Daobin Zhang
中科院分区：
文献类型：
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作者：
Hui Zhang;Jianhua Zhang;Chunyang Zhang;Fang Liu;Daobin Zhang
研究了超声波与先进的芬顿法（AFP、零价铁和过氧化氢）联用降解C. I.研究了酸性橙子7。研究了过氧化氢浓度、初始pH值、超声功率密度、溶解气体、铁粉添加量等因素对C.I.研究了酸性橙子7。采用修正的准一级动力学模型对实验结果进行了模拟。结果表明，脱色率随过氧化氢浓度和功率密度的增大而增大，随初始pH值的增大而减小。就脱色率而言，存在一个最佳铁粉添加量。脱色效率也随过氧化氢浓度的增加而增加，但随初始pH值的增加而降低。在过氧化氢浓度一定的情况下，不同的功率密度或铁粉添加量，其变化不大。溶解气体的存在会促进脱色，溶解氧的存在对脱色的促进作用更明显。需要更多的过氧化氢剂量和反应持续时间来实现比用于简单地破坏发色团基团的那些相对高的COD去除。
The combination of ultrasound and the advanced Fenton process (AFP, zero-valent iron and hydrogen peroxide) for the degradation of C.I. Acid Orange 7 was studied. The effect of hydrogen peroxide concentration, initial pH, ultrasonic power density, dissolved gas, and iron powder addition on the decolorization of C.I. Acid Orange 7 was investigated. A modified pseudo-first order kinetic model was used to simulate the experimental results. The results showed that the decolorization rate increased with the increase of hydrogen peroxide concentration and power density, but decreased with the increase of initial pH value. There existed an optimal iron powder addition when decolorization rate was concerned. The decolorization efficiency also increased with the increase of hydrogen peroxide concentration, but decreased with the increase of initial pH value. It varied little at different power densities or iron powder additions at the fixed hydrogen peroxide concentration. The presence of dissolved gas would enhance color removal, and the enhancement was more significant when dissolved oxygen was present. More hydrogen peroxide dosage and reaction duration are required to achieve a relatively high COD removal than those employed to simply break the chromophore group.