Citation: Bing Zhang, Guoqing Jiang, Wenxin Shi, Yanei Xue, Wenjun Sun. Vacuum-ultraviolet technology photolysis of aqueous reaction systems for organic pollutants abatement[J]. Chinese Chemical Letters, ;2026, 37(2): 111371. doi: 10.1016/j.cclet.2025.111371 shu

Vacuum-ultraviolet technology photolysis of aqueous reaction systems for organic pollutants abatement

Bing Zhang ^{a, b} ,
Guoqing Jiang ^{a, c} ,
Wenxin Shi ^{a, b, *,} ,
Yanei Xue ^{c, **,} ,
Wenjun Sun ^c

a.
College of Environment and Ecology, Chongqing University, Chongqing 400044, China
b.
Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment Ministry of Education, Chongqing University, Chongqing 400044, China
c.
School of Environment, Tsinghua University, Beijing 100084, China

swx@hit.edu.cn

xueyanei@mail.tsinghua.edu.cn

Received Date: 23 September 2024
Revised Date: 21 May 2025
Accepted Date: 26 May 2025
Available Online: 27 May 2025

Figures(4)

Vacuum-ultraviolet (VUV) radiation is high-energy UV radiation with a wavelength of 100–200 nm capable of decomposing/mineralizing hazardous emerging organic pollutants (EPs) in water through direct photolysis and/or by generating reactive free radicals (RFRs) during photolysis. However, due to the unsatisfactory photoelectric conversion rate, strong absorption by oxygen and water molecules, and other characteristics of VUV radiation, its application and development are hindered, leading to misconceptions regarding high energy consumption and insufficient free radical yield. The objectives of our assessment in this review are as follows: The illumination of the photochemical characteristics of VUV and the reactivity of aqueous solutions. Summarization of accurate UV dose and energy evaluation criteria. Comparison and analysis of the photochemical mechanisms and reaction kinetics of different types of EPs via VUV direct photolysis, as well as the interference origins of typical substrates in water for VUV decontamination. We found that quantities typically reported in VUV photochemical reactions of engineered systems are underreported in low-pressure mercury lamp (LPUV) photochemical reactions, especially a quantitative indicator of the species or energy that induces a chemical reaction. The absence of these quantities has made it difficult to assess the fundamental performance of VUV photolysis fully compared with that of UV-C. Some studies have sought to optimize VUV-advanced reduction processes (VUV-ARP) or VUV reactor treatment of these contaminants; however, an abundant evaluation of the reaction origins and processes between VUV-derived main RFRs and reactants (H₂O, O₂, organic matter, inorganic ions, etc.) is essential, cause these scientific elements will provide the possibility to break the application gap for VUV in the field of EPs treating. Overall, the data compilation, analysis, and research recommendations provided in this review will form the basis for all photochemical reactions initiated by VUV radiation with water as the backing agent.
- Vacuum-ultraviolet,
- Reactive free radicals,
- UV dose,
- Advanced reduction processes,
- Direct photolysis
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沈阳化工大学材料科学与工程学院沈阳 110142