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Enhancement of UV-assisted photo-Fenton degradation of reactive orange 4 using TiO2-P25 nanoparticles

机译:使用TiO2-P25纳米颗粒增强UV辅助的光芬顿降解活性橙4

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A combined homogeneous and heterogeneous photocatalytic decolourisation and degradation of a chlorotriazine azo dye reactive orange 4(RO 4)have been carried out using ferrous sulphate/ferrioxalate with H2O2 and TiO2-P25 nanoparticles.Enhancement in the photo-Fenton processes has been observed by the addition of TiO2-P25.UV/ferrous/H2O2/TiO2 and UV/ferrioxalate/H2O2/TiO2 processes are found to be more efficient than the individual photo-Fenton and UV/TiO2-P25 processes.The use of ferrioxalate in the combined process is found to be more advantageous.The effects of various experimental parameters such as pH,initial H2O2,Fe2+,Fe3+ and TiO2 concentrations on these combined photocatalytic processes have been investigated.All these parameters strongly influenced the removal rate.The optimum operating conditions of these combined processes are reported.
机译:使用硫酸亚铁/草酸亚铁与H2O2和TiO2-P25纳米粒子对氯三嗪偶氮染料活性橙4(RO 4)进行了均相和非均相的光催化脱色和降解的组合研究。发现添加TiO2-P25.UV /亚铁/ H2O2 / TiO2和UV /草酸铁/ H2O2 / TiO2工艺比单独的光芬顿和UV / TiO2-P25工艺更有效。研究了pH,初始H2O2,Fe2 +,Fe3 +和TiO2浓度等各种实验参数对这些组合光催化工艺的影响,所有这些参数都对去除率产生了强烈影响,这些条件的最佳操作条件报告了合并的过程。

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