Fazliev Timur, Lyulyukin Mikhail, Kozlov Denis, Selishchev Dmitry
Research and Educational Center "Institute of Chemical Technologies", Novosibirsk State University, Pirogova St. 2, Novosibirsk 630090, Russia.
Competence Center of the National Technological Initiative "Hydrogen as the Basis of a Low-Carbon Economy", Lavrentieva Ave. 7, Novosibirsk 630090, Russia.
Molecules. 2024 Dec 26;30(1):49. doi: 10.3390/molecules30010049.
Ethylene glycol (EG) is a contaminant in the wastewater of airports because it is commonly used in aircraft deicing fluids during the cold season in northern regions. Ethylene glycol by itself has relatively low toxicity to mammals and aquatic organisms, but it can lead to a substantial increase in chemical and biological oxygen demands. The contamination of water with EG facilitates the rapid growth of microbial biofilms, which decreases the concentration of dissolved oxygen in water and negatively affects overall biodiversity. The development of a simple method to decompose EG with high efficiency and low operating costs is important. This study revealed that ethylene glycol can be completely oxidized using UV-C activated hydrogen peroxide (HO/UV-C) at a high rate (up to 56 mg L h) at an optimum EG:HO molar ratio of 1:10-1:15. Air purging the reaction mixture at 1000 cm min increases the EG mineralization rate up to two times because the simultaneous action of UV-activated HO and O (HO + O/UV-C) leads to a synergistic effect, especially at low EG:HO ratios. The kinetics and mechanism of EG degradation are discussed on the basis of the concentration profiles of ethylene glycol and intermediate products.
乙二醇（EG）是机场废水中的一种污染物，因为在北方地区的寒冷季节，它常用于飞机除冰液。乙二醇本身对哺乳动物和水生生物的毒性相对较低，但它会导致化学需氧量和生物需氧量大幅增加。乙二醇对水的污染会促进微生物生物膜的快速生长，这会降低水中溶解氧的浓度，并对整体生物多样性产生负面影响。开发一种高效、低成本分解乙二醇的简单方法很重要。本研究表明，在最佳乙二醇与过氧化氢的摩尔比为1:10至1:15时，使用紫外线C（UV-C）活化的过氧化氢（HO/UV-C）可以高速率（高达56毫克/升·小时）将乙二醇完全氧化。以1000立方厘米/分钟的速度对反应混合物进行空气吹扫，可使乙二醇矿化率提高两倍，因为紫外线活化的HO和O（HO + O/UV-C）的同时作用会产生协同效应，尤其是在低乙二醇与过氧化氢比例时。基于乙二醇和中间产物的浓度分布，讨论了乙二醇降解的动力学和机理。
