Abstract The goal of this work was the synthesis of a montmorillonite based catalyst for advanced oxidative degradation of organic water pollutants. Montmorillonite (Mt) –rich bentonite was acid-activated (MtA), and impregnated with cobalt (II) solution using the incipient wetness impregnation method. The impregnation was followed by heat treatment. Cobalt(II) ions were added in the quantities corresponding to 0.5 and 1.0 of the cation exchange capacity value. All samples were characterized by using chemical analysis, X-ray powder diffraction (XRPD), Electron paramagnetic resonance (EPR), X-ray photoelectron spectroscopy (XPS), Scanning electron microscopy (SEM) coupled with Energy-dispersive X-ray spectroscopy (EDS), Transmission electron microscopy (TEM) and low temperature N2 physisorption. The incorporation of the cobalt in the impregnated samples and the development of porous structure in the acid-activated ones were confirmed. The montmorillonite (Mt) was used as a catalyst support, while the cobalt in its oxide form was responsible for the generation of sulfo-radicals from Oxone®. Two aromatic N-compounds were tested as model pollutants: diazo dye - Acid Orange 10 (AO10) and nicotine. It was found that the synthesized catalysts could be used for the degradation of both pollutants, although more efficiently in AO10 degradation. The acid activation, higher cobalt loading, and temperature were found to be beneficial for the degradation of AO10.

中文翻译：

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含钴蒙脱石基催化剂氧化降解芳香族氮化合物

摘要 这项工作的目标是合成一种基于蒙脱石的催化剂，用于有机水污染物的高级氧化降解。富含蒙脱石 (Mt) 的膨润土经过酸活化 (MtA)，并使用初湿浸渍法用钴 (II) 溶液浸渍。浸渍后进行热处理。钴(II)离子以对应于阳离子交换容量值的0.5和1.0的量添加。所有样品均通过化学分析、X 射线粉末衍射 (XRPD)、电子顺磁共振 (EPR)、X 射线光电子能谱 (XPS)、扫描电子显微镜 (SEM) 与能量色散 X 射线光谱法 ( EDS)、透射电子显微镜 (TEM) 和低温 N2 物理吸附。钴在浸渍样品中的掺入和酸活化样品中多孔结构的发展得到证实。蒙脱石 (Mt) 用作催化剂载体，而氧化物形式的钴负责从 Oxone® 生成磺基自由基。测试了两种芳香族 N 化合物作为模型污染物：重氮染料 - 酸性橙 10 (AO10) 和尼古丁。发现合成的催化剂可用于降解两种污染物，但在 AO10 降解中更有效。发现酸活化、更高的钴负载量和温度有利于 AO10 的降解。而氧化物形式的钴负责从 Oxone® 中生成磺基自由基。测试了两种芳香族 N 化合物作为模型污染物：重氮染料 - 酸性橙 10 (AO10) 和尼古丁。发现合成的催化剂可用于降解两种污染物，但在 AO10 降解中更有效。发现酸活化、更高的钴负载量和温度有利于 AO10 的降解。而氧化物形式的钴负责从 Oxone® 中生成磺基自由基。测试了两种芳香族 N 化合物作为模型污染物：重氮染料 - 酸性橙 10 (AO10) 和尼古丁。发现合成的催化剂可用于降解两种污染物，但在 AO10 降解中更有效。发现酸活化、更高的钴负载量和温度有利于 AO10 的降解。