The targeted elimination of stubborn organic pollutants is crucial for human health and ecosystem well-being. Thanks to its exceptional efficiency and other benefits, peroxymonosulfate offers extensive potential for water treatment. However, realizing the practical application of this technology hinges on creating a high-efficiency catalyst. This study presents the fabrication of a monoatomic Ru catalyst through a straightforward hydrothermal approach. Synchrotron radiation and spherical electron microscopy were used to confirm the binding of monoatomic Ru to the NiFe-LDH (Layered Double Hydroxide, LDH) surface. Using a catalyst containing 0.77 wt% of single-atom Ru, 20 mg/L of Carbamazepine (CBZ) could be eliminated within 25 mins. With this, an impressive pseudo-first-order reaction rate constant of 0.118 min was attained. The feasibility of the catalyst was evaluated in a column experimental reactor. The removal rate of 0.5 g of catalyst in wastewater containing 20 mg/L CBZ reached 100 %, demonstrating sustained operation for 720 mins. Ru-LDH/PMS system preferentially degrades carbamazepine, ciprofloxacin and other pollutants. This may be related to the structure and HOMO value of the pollutants and the active factors stimulated by Ru-LDH. Through a range of probe reactions and spectral analysis, it was determined that O played a pivotal role in pollutant degradation, closely linked to the presence of Ru.

中文翻译：

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使用单原子 Ru-NiFe-LDH 有效催化降解卡马西平：1O2 的作用和选择性降解


有针对性地消除顽固有机污染物对于人类健康和生态系统福祉至关重要。由于其卓越的效率和其他优点，过一硫酸盐为水处理提供了广泛的潜力。然而，实现该技术的实际应用取决于创造高效的催化剂。这项研究提出了通过简单的水热方法制造单原子钌催化剂。使用同步辐射和球形电子显微镜确认单原子 Ru 与 NiFe-LDH（层状双氢氧化物，LDH）表面的结合。使用含有 0.77 wt% 单原子 Ru 的催化剂，可以在 25 分钟内消除 20 mg/L 卡马西平 (CBZ)。由此，获得了令人印象深刻的 0.118 分钟的伪一级反应速率常数。在塔式实验反应器中评价了催化剂的可行性。含20mg/L CBZ的废水中0.5g催化剂的去除率达到100%，持续运行720分钟。 Ru-LDH/PMS系统优先降解卡马西平、环丙沙星等污染物。这可能与污染物的结构和HOMO值以及Ru-LDH激发的活性因子有关。通过一系列探针反应和光谱分析，确定 O 在污染物降解中发挥着关键作用，与 Ru 的存在密切相关。