Xie Yun-Qiu, Zhang Zhi-Quan, Wang Jing, Huang Jun-Jie, Shi De-Zhi, Chen Fei
Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing 400045, China.
Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing 400045, China.
Water Res. 2025 Sep 15;284:123977. doi: 10.1016/j.watres.2025.123977. Epub 2025 Jun 7.
Hydrogen peroxide (HO) is a green oxidant with broad potential in organic wastewater treatment applications. However, conventional research typically examines either HO generation or its specific utilization independently, lacking a comprehensive exploration of integrated mechanisms from production to practical application. To bridge this gap, this study introduced scalable and eco-friendly bismuth oxyhalide piezocatalysts to construct an integrated system for simultaneous HO production and efficient in-situ utilization. Such a cleverly designed system exhibited exceptional piezocatalytic HO production exceeding 710 μmol·g·h via dual pathways, including water oxidation reaction (WOR) and oxygen reduction reaction (ORR). Life-cycle assessments and energy consumption analyses further validated the superior sustainability and efficiency of the proposed system compared to traditional piezoelectric catalysts. For direct applications of HO, the integrated system could achieve excellent performance in wastewater disinfection, demonstrating a 70.7 % antibacterial efficiency, and simultaneous decontamination with 94.7 % removal of sulfamethoxazole alongside a 10-fold kinetic enhancement compared to systems with externally added HO systems. Moreover, in synergistic scenarios, combining HO and periodate (PI) could effectively generate hydroxyl radicals (OH) and singlet oxygen (O), achieving over 90 % removal efficiency for diverse refractory pollutants under complex water conditions (e.g., wide pH range 2.0-10.0, presence of coexisting anions and natural organic matter). The environmental safety of the constructed reaction system was further confirmed by a comprehensive toxicity assessment combining computational modeling with microbial and plant assays. This study bridges the existing gap between HO generation and application, providing significant insights and advancing integrated water treatment strategies.
过氧化氢（HO）是一种绿色氧化剂，在有机废水处理应用中具有广泛的潜力。然而，传统研究通常独立考察HO的生成或其具体利用情况，缺乏对从生产到实际应用的综合机制的全面探索。为了弥补这一差距，本研究引入了可扩展且环保的卤氧化铋压电催化剂，构建了一个同时生产HO并高效原位利用的集成系统。这样一个精心设计的系统通过包括水氧化反应（WOR）和氧还原反应（ORR）在内的双途径，展现出超过710 μmol·g·h的卓越压电催化HO生成能力。生命周期评估和能耗分析进一步验证了与传统压电催化剂相比，所提出系统具有更高的可持续性和效率。对于HO的直接应用，该集成系统在废水消毒方面可实现优异性能，展现出70.7%的抗菌效率，并且与外部添加HO的系统相比，在同时去除磺胺甲恶唑时具有94.7%的去除率以及10倍的动力学增强。此外，在协同场景中，将HO与高碘酸盐（PI）结合可有效生成羟基自由基（OH）和单线态氧（O），在复杂水条件下（例如pH范围2.0 - 10.0较宽、存在共存阴离子和天然有机物）对多种难降解污染物实现超过90%的去除效率。通过结合计算建模与微生物和植物分析的综合毒性评估，进一步证实了所构建反应系统的环境安全性。本研究弥补了HO生成与应用之间的现有差距，提供了重要见解并推进了综合水处理策略。
