Enhanced oxidation of 2,4-dichlorophenol in ferrate(VI) and copper oxide system via the formation of trivalent copper ion and singlet oxygen.

Chemosphere Pub Date : 2024-12-15 DOI:10.1016/j.chemosphere.2024.143970

Guihai Zhang, Yidan Luo, Jiancheng Cheng, Xinlong Hua, Guizhou Xu, Mengqin Yu, Zhu Wang, Yalan Zhang, Wei Liu, Yingxin Du, Xianchuan Xie, Daishe Wu, Zugen Liu

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Abstract

Improving the activity of ferrate is one of the main research focus in environmental field. Here, we demonstrate a novel copper oxide (CuO)-Ferrate(VI) system wherein CuO plays a key role in activating Fe(VI) to effectively eliminate phenolic contaminants. The dominant reactive species were determined to be Cu(III) and ¹O₂, confirmed by in situ Raman spectroscopy, quenching experiments, and EPR tests. The results indicated that Fe(VI) preferentially reacts with CuO, forming Cu(III) and ¹O₂. Subsequently, deprotonated 2,4-dichlorophenol (2,4-DCP) was adsorbed with Cu(III) via electrostatic adsorption and was directly oxidized by Cu(III). Co-existing ion experiments demonstrated the strong stability of the CuO/Fe(VI) system against environmental background substances, maintaining effective removal efficiency over multiple cycles. In summary, this study highlights the potential advantages of CuO-assisted Fe(VI) activation, offering a new route for the efficient utilization of Fe(VI) in eliminating phenolic pollutants.

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高铁酸盐（VI）和氧化铜体系中2,4-二氯苯酚通过形成三价铜离子和单线态氧而增强氧化。

提高高铁酸盐的活性是环境领域的主要研究热点之一。在这里，我们展示了一种新的氧化铜(CuO)-高铁酸盐（VI）体系，其中CuO在激活Fe（VI）以有效消除酚类污染物方面起关键作用。通过原位拉曼光谱、猝灭实验和EPR测试，确定了Cu（III）和1O2是主要的活性物质。结果表明，Fe（VI）优先与CuO反应，生成Cu（III）和1O2。随后，去质子化的2,4-二氯苯酚（2,4- dcp）通过静电吸附被Cu（III）吸附，并被Cu（III）直接氧化。共存离子实验表明，CuO/Fe（VI）体系对环境背景物质具有较强的稳定性，在多个循环中保持有效的去除效率。综上所述，本研究突出了cuo辅助Fe（VI）活化的潜在优势，为高效利用Fe（VI）去除酚类污染物提供了一条新途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Chemosphere

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