Yu Ziwei, Jin Xuming, Guo Yang, Liu Qian, Xiang Wenyu, Zhou Shuai, Wang Jiaying, Yang Dailin, Wu Hao Bin, Wang Juan
College of Environmental & Resource Sciences, Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Zhejiang University, Hangzhou, 310058, China.
Institute for Composites Science Innovation (InCSI) and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China.
Nat Commun. 2024 Feb 8;15(1):1186. doi: 10.1038/s41467-024-45481-y.
In-situ wastewater treatment has gained popularity due to cost and energy savings tailored to water sources and user needs. However, this treatment, particularly through advanced oxidation processes (AOPs), poses ecological risks due to the need for strong oxidizing agents. Here, we present a decoupled oxidation process (DOP) using single-atom copper-modified graphite felt electrodes. This process creates a positive potential difference (ΔE ~ 0.5 V) between spatially isolated oxidants and organics and drives electron transfer-based redox reactions. The approach avoids the drawbacks of conventional AOPs, while being capable of treating various recalcitrant electron-rich organics. A floating water treatment device designed based on the DOP approach can degrade organic molecules in large bodies of water with oxidants stored separately in the device. We demonstrate that over 200 L of contaminated water can be treated with a floating device containing only 40 mL of oxidant (10 mM peroxysulphate). The modular device can be used in tandem structures on demand, maximizing water remediation per unit area. Our result provides a promising, eco-friendly method for in-situ water treatment that is unattainable with existing techniques.
原位废水处理因其能根据水源和用户需求实现成本节约与能源节省而受到欢迎。然而，这种处理方式，尤其是通过高级氧化工艺（AOPs），由于需要强氧化剂而带来生态风险。在此，我们展示了一种使用单原子铜修饰石墨毡电极的解耦氧化工艺（DOP）。该工艺在空间上隔离的氧化剂和有机物之间产生正电位差（ΔE ~ 0.5 V），并驱动基于电子转移的氧化还原反应。这种方法避免了传统AOPs的缺点，同时能够处理各种难降解的富电子有机物。基于DOP方法设计的浮动水处理装置可以利用分别存储在装置中的氧化剂降解大片水域中的有机分子。我们证明，仅含有40毫升氧化剂（10毫摩尔过硫酸盐）的浮动装置就能处理超过200升的受污染水。该模块化装置可根据需要以串联结构使用，最大限度地提高单位面积的水修复效率。我们的结果为原位水处理提供了一种现有技术无法实现的、有前景的环保方法。
