School of Environment, State Key Joint Laboratory of Environmental Simulation and Pollution Control, Beijing Key Laboratory for Emerging Organic Contaminants Control, Tsinghua University, Beijing 100084, China.
School of Environment, State Key Joint Laboratory of Environmental Simulation and Pollution Control, Beijing Key Laboratory for Emerging Organic Contaminants Control, Tsinghua University, Beijing 100084, China.
Chemosphere. 2018 Oct;208:640-654. doi: 10.1016/j.chemosphere.2018.05.095. Epub 2018 May 22.
The electro-peroxone (E-peroxone) process is an emerging electrochemical advanced oxidation process (EAOP) that combines ozonation with in situ cathodic hydrogen peroxide (HO) production to drive the peroxone reaction for water and wastewater treatment. Over the past several years, the E-peroxone process has quickly emerged as a promising EAOP for the abatement of emerging contaminants (ECs) in water. Because of the enhanced ozone (O) transformation to hydroxyl radicals (OH) by electro-generated HO, the E-peroxone process can considerably increase the efficiency and decrease the energy demand for the abatement of ozone-resistant ECs compared with conventional ozonation. Meanwhile, the E-peroxone process can substantially mitigate the formation of bromate during the treatment of bromide-containing water, which has been a major concern of conventional ozonation for water treatment. Hence, by simply installing electrodes in ozone contactors, the E-peroxone process can remarkably enhance the performance of water and wastewater treatment in various aspects. Compared with other ozone-based AOPs such as the conventional peroxone (O/HO) and UV/O processes, the E-peroxone process also represents a more convenient, cost-effective, energy-efficient, and safer option for EC abatements. This paper reviews recent research of the E-peroxone process, with focus on the abatement of ECs in real water matrices. The fundamental reaction mechanisms that are essential to the understanding, design, and operation of the E-peroxone process are described. The abatement of various ECs in natural water and wastewater by the E-peroxone process are critically reviewed. The challenges in scaling-up the E-peroxone process and integrating it in water and wastewater treatment trains for practical applications are discussed.
电过氧单（E-peroxone）工艺是一种新兴的电化学高级氧化工艺（EAOP），它将臭氧氧化与原位阴极过氧化氢（HO）生产相结合，以驱动过氧反应，用于水和废水处理。在过去的几年中，E-peroxone 工艺作为一种有前途的 EAOP，迅速用于去除水中的新兴污染物（ECs）。由于电生成的 HO 增强了臭氧（O）向羟基自由基（OH）的转化，因此与传统的臭氧氧化相比，E-peroxone 工艺可以显著提高臭氧抗性 ECs 的去除效率并降低能源需求。同时，E-peroxone 工艺可以大大减少含溴水在处理过程中溴酸盐的形成，这一直是传统臭氧氧化处理水的主要关注点。因此，只需在臭氧接触器中安装电极，E-peroxone 工艺就可以在各个方面显著提高水和废水处理的性能。与其他基于臭氧的 AOP 相比，例如传统的过氧单（O/HO）和 UV/O 工艺，E-peroxone 工艺也是 EC 去除的更方便、更具成本效益、更节能和更安全的选择。本文综述了 E-peroxone 工艺的最新研究进展，重点是在真实水基质中 ECs 的去除。描述了对 E-peroxone 工艺的理解、设计和操作至关重要的基本反应机制。批判性地回顾了 E-peroxone 工艺在天然水和废水中各种 ECs 的去除情况。讨论了 E-peroxone 工艺放大和集成到实际应用中的水和废水处理工艺中的挑战。
