Applications of advanced oxidation processes (AOPs) in water and wastewater treatment have been the subject of growing interest throughout the last decade. Although UV/hydrogen peroxide (UV-H₂O₂) is the most established technology among the UV-AOPs, UV-chlorine (UV-Cl) is emerging as a reliable and potentially more cost-effective alternative. Recent studies have indicated that UV-Cl processes may be more efficient and economically favourable for the degradation of some chemicals of emerging concern from contaminated water. Moreover, in terms of the formation of disinfection by-products (DBPs), UV-H₂O₂ seems to have no superiority over UV-Cl. This said, more investigation in the assessment of genotoxicity and cytotoxicity of DBPs is required. Additionally, more pilot-scale and full-scale studies are required to establish UV-Cl as a reliable alternative to UV- H₂O₂. This paper compares UV-Cl and UV-H₂O₂ AOPs for the degradation of intractable chemicals from water and wastewater based on the practical considerations of efficiency, cost, DBP formation, kinetics and sensitivity to water matrix variability. Finally, various modelling approaches to UV-Cl have been reviewed. This review showed that UV-Cl is superior to UV-H₂O₂ in terms of degradation efficiency and cost effectiveness and can be a robust alternative in many UV-AOPs applications.

中文翻译：

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UV-Cl 和 UV-H2O2 高级氧化工艺降解水和废水中污染物的比较：综述

过去十年中，高级氧化工艺 (AOP) 在水和废水处理中的应用已成为人们日益关注的主题。尽管紫外线/过氧化氢 (UV-H ₂ O ₂ ) 是 UV-AOP 中最成熟的技术，但紫外线-氯 (UV-Cl) 正在成为一种可靠且可能更具成本效益的替代方案。最近的研究表明，UV-Cl 工艺对于降解受污染的水中新出现的一些化学品可能更有效且经济上有利。此外，就消毒副产物（DBP）的形成而言，UV-H ₂ O ₂似乎并不比UV-Cl 优越。这就是说，需要对 DBP 的遗传毒性和细胞毒性评估进行更多研究。此外，还需要更多的中试规模和全面研究来确定 UV-Cl 作为 UV-H ₂ O ₂的可靠替代品。本文基于效率、成本、DBP 形成、动力学和对水基质变化的敏感性的实际考虑，比较了 UV-Cl 和 UV-H ₂ O _{2 AOP 降解水和废水中难处理化学品的效果。}最后，回顾了 UV-Cl 的各种建模方法。该综述表明，UV-Cl在降解效率和成本效益方面优于 UV-H ₂ O _{2 ，并且可以成为许多 UV-AOP 应用中的可靠替代品。}