| UV/Si-FeOOH/H2O2氧化降解水中邻苯二甲酸二甲酯 |
| 摘要点击 2633 全文点击 1052 投稿时间：2009-10-05 修订日期：2010-03-25 |
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| 中文关键词 邻苯二甲酸二甲酯 无定型 Si-FeOOH 类Fenton 光氧化 |
| 英文关键词 dimethyl phthalate (DMP) amorphous structure Si-FeOOH Fenton-like photodegradation |
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| 中文摘要 |
| 通过Si掺杂方式自制无定型Si-FeOOH催化剂，并将其用于UV/Si-FeOOH/H2O2光解体系降解内分泌干扰物邻苯二甲酸二甲酯（DMP），通过XRD、IR和SEM测试研究了Si-FeOOH的晶相结构，并与普通FeOOH进行铁溶出对比，研究pH值等因素对Si-FeOOH表面吸附和对协同体系降解DMP效能的影响.结果表明，通过Si掺杂所制得的Si-FeOOH为无定型结构，比表面积大，铁溶出率低；在Si/Fe摩尔比为0.2的Si-FeOOH投量为0.5 g/L，pH=5.0，H2O2浓度为2.0 mmol/L，125 W UV365条件下，DMP的降解效果显著，30 min内DMP降解率达到97%.与单一方法相比， UV、Si-FeOOH、H2O2三者的协同作用使得光-类Fenton可有效降解水中DMP， Si-FeOOH经多次循环使用后仍有较好的催化活性. |
| 英文摘要 |
| In this study the new catalyst Si-FeOOH was synthesized by adding Si to the traditional FeOOH and the mechanic strength of this new catalyst could be enhanced greatly. The photo-degradation of dimethyl phthalate (DMP) by UV/Si-FeOOH/H2O2 was investigated. The new catalyst Si-FeOOH was amorphous structure with high surface area and low soluble iron by XRD, IR and SEM. The efficiency of DMP degradation by UV/Si-FeOOH/H2O2 could reach 97% after 30 min reaction time at pH 5, 0.5 g/L dosage of Si-FeOOH, and 2.0 mmol/L of H2O2 under 125W UV365 irradiation. DMP could be degraded effectively by synergistic effect of UV, Si-FeOOH and H2O2. The Si-FeOOH photocatalyst can be very easily recovered and its catalytic activity also remained after several rounds of reaction. |
