Abstract

For a low cost and efficient oxidation process of industrial textile dye, this investigation described an economic process for the Indigo Carmine (IC) dye degradation from aqueous solution. Our study used a novel natural carbonated concretion catalyst, aragonite, which was collected from the thermal station waste located in El Hamma, Southwestern Tunisia, as an advanced oxidation process. This new studied ferrous sample Fe-rich aragonite (Fe–Ar) was characterized using various techniques, such as X-ray diffraction (XRD), Specific Surface Area (BET) and Infrared Spectroscopy (FTIR). The textural, structural and chemical characterizations confirmed the presence of Aragonite phases with a high amount of iron (almost 30%) on the surface material. The new catalyst activity was evaluated in the oxidation of IC dye in an aqueous solution by Fenton and photo-Fenton process. The test results show that the Fe-rich aragonite exhibited higher photocatalytic oxidation activity at pH 3. In addition, the IC dye could effectively be removed from the aqueous solution by photo-Fenton process in the existence of the used material as catalyst. Based on this work, the importance of this material in the purification of industrial effluents loaded with dyes is confirmed proving that this material can replace a very expensive commercial catalyst materials used in fenton and photo-Fenton technologies.

Graphic Abstract

中文翻译：

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利用Fenton和Photo-Fenton技术将富铁文石凝结物应用于工业染料纯化

摘要

对于工业纺织品染料的低成本高效氧化方法，此研究描述了从水溶液中降解靛蓝胭脂红（IC）染料的经济方法。我们的研究使用了一种新型的天然碳酸固结催化剂文石，该文石是从突尼斯西南部El Hamma的热电站废物中收集的，作为一种先进的氧化过程。这项新研究的铁样品富含铁的文石（Fe–Ar）使用多种技术进行了表征，例如X射线衍射（XRD），比表面积（BET）和红外光谱（FTIR）。织构，结构和化学特征证实了在表面材料上存在文石相，其中铁含量很高（几乎占30％）。通过Fenton和光Fenton工艺在水溶液中IC染料的氧化中评估了新的催化剂活性。测试结果表明，富铁文石在pH 3时具有较高的光催化氧化活性。另外，在存在所用材料作为催化剂的情况下，可以通过光芬顿法从水溶液中有效去除IC染料。基于这项工作，证实了该材料在纯化载有染料的工业废水中的重要性，证明了该材料可以替代芬顿和光芬顿技术中使用的非常昂贵的商业催化剂材料。在存在所用材料作为催化剂的情况下，可以通过光芬顿法从水溶液中有效去除IC染料。基于这项工作，证实了该材料在纯化载有染料的工业废水中的重要性，证明了该材料可以替代芬顿和光芬顿技术中使用的非常昂贵的商业催化剂材料。在存在所用材料作为催化剂的情况下，可以通过光芬顿法从水溶液中有效去除IC染料。基于这项工作，证实了该材料在纯化载有染料的工业废水中的重要性，证明了该材料可以替代芬顿和光芬顿技术中使用的非常昂贵的商业催化剂材料。

图形摘要