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首页> 外文期刊>Separation and Purification Technology >Photo Fenton degradation of high concentration Orange II (2 mM) using catalysts containing Fe: A comparative study
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Photo Fenton degradation of high concentration Orange II (2 mM) using catalysts containing Fe: A comparative study

机译：使用含铁的催化剂光芬顿降解高浓度橙色II（2 mM）的比较研究

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摘要

Photo Fenton discoloration and mineralization of high concentration Orange II (2 mM) was conducted by using three catalysts containing Fe in the presence of 2 x 8W UVC light (254nm) and 100 mM H2O2 at an initial solution pH of 3.0. The three catalysts are laponite clay based Fe nanocomposite (Fe-Lap-RD), betonite clay based Fe nanocomposite (Fe-B), and iron oxide hydrated (FeOOH). All of them showed a good photo catalytic activity in the discoloration of 2 mM Orange II. 100% discoloration was achieved within 120 min in the presence of 1.0 g Fe-Lap-RD/L while 100% discoloration needs 180 min reaction in the presence of 1.0 g Fe-B or FeOOH. In terms of discoloration, the efficiency of the catalysts follows the order: Fe-Lap-RD > Fe-B ≈ FeOOH. However, in the mineralization of 2 mM Orange II, only Fe-Lap-RD and Fe-B showed good photo catalytic activity while FeOOH showed poor photo catalytic activity after 300 min reaction. In the cases of 1.0 g Fe-Lap-RD/L and Fe-B, more than 95-98% TOC removal of 2 mM Orange II can be achieved while only 82% TOC removal was obtained in the presence of 1.0 g FeOOH/L. In terms of the final TOC removal, the efficiency of the three catalysts follows the order: Fe-Lap-RD > Fe-B > FeOOH. The efficiency of 1.0 g Fe-Lap-RD/L is similar to that of 10 mg Fe~(3+)/L The results revealed that using Fe-Lap-RD as a heterogeneous catalyst for the degradation of high concentration Orange II is successful. Furthermore, our results also illustrate that both homogeneous and heterogeneous photo Fenton reactions are responsible for the complete discoloration and mineralization of high concentration Orange II.
机译：在2 x 8W UVC光（254nm）和100 mM H2O2存在下，在初始溶液pH为3.0的条件下，使用三种含铁的催化剂，进行高浓度Orange II（2 mM）的光芬顿变色和矿化。三种催化剂是基于皂石粘土的铁纳米复合材料（Fe-Lap-RD），基于膨润土的铁纳米复合材料（Fe-B）和水合氧化铁（FeOOH）。它们在2 mM Orange II的变色中均显示出良好的光催化活性。在存在1.0 g Fe-Lap-RD / L的情况下，在120分钟内达到100％的褪色，而在1.0 g Fe-B或FeOOH的存在下，100％的褪色需要180分钟的反应。在变色方面，催化剂的效率遵循以下顺序：Fe-Lap-RD> Fe-B≈FeOOH。然而，在2 mM Orange II的矿化中，只有Fe-Lap-RD和Fe-B显示出良好的光催化活性，而FeOOH在300分钟反应后显示出较差的光催化活性。在1.0 g Fe-Lap-RD / L和Fe-B的情况下，可以实现2 mM Orange II的TOC去除率超过95-98％，而在1.0 g FeOOH /存在下，TOC去除率仅为82％。 L.就最终的TOC去除而言，三种催化剂的效率依次为：Fe-Lap-RD> Fe-B> FeOOH。 1.0 g Fe-Lap-RD / L的效率与10 mg Fe〜（3 +）/ L的效率相似。结果表明，使用Fe-Lap-RD作为多相催化剂降解高浓度的Orange II是成功。此外，我们的结果还表明，均相和异相光子Fenton反应都是导致高浓度Orange II完全变色和矿化的原因。

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