College of Water Sciences, Beijing Normal University, Beijing, 100875, China; Heibei Key Laboratory of Hazardous Chemicals Safety and Control Technology, School of Chemical Safety, North China Institute of Science and Technology, Langfang, 065201, China.
College of Water Sciences, Beijing Normal University, Beijing, 100875, China.
J Environ Manage. 2023 Dec 15;348:119386. doi: 10.1016/j.jenvman.2023.119386. Epub 2023 Oct 23.
Various activated persulfate (PS) technologies have been investigated and implemented to eliminate antibiotic contaminants from water. The investigation and evaluation of different activation systems are essential for the application of PS techniques. The degradation of amoxicillin (AMX) by heat, light, or heterogeneous catalyst of Fe-AC composite activated PS was investigated, and the kinetics, mechanisms and toxicities were compared in this work. The apparent activation energy of the Fe-AC system was lower than that of the heat system. Hydroxyl and sulfate radicals were demonstrated by electron paramagnetic resonance (EPR) spectroscopy and quenching tests. There were 22, 21 and 13 types of degradation intermediates detected in heat, light and Fe-AC system, respectively. Six pathways of AMX degradation were proposed and compared in the three activated PS systems. The toxicity prediction of degradation intermediates under different treatment processes was estimated by ecological structure-activity relationship model and toxicity estimation software tool. The genotoxicity of the AMX degradation solution was tested by Acinetobacter baylyi ADP1_recA, which indicated that the AMX solution after treatment in the Fe-AC system had almost no genotoxicity. The Fe-AC/PS system shows apparent advantages over the heat or light activated PS system in most cases, demonstrating that the Fe-AC/PS system is suitable for AMX-contaminated remediation in aqueous solution.
各种活化过硫酸盐（PS）技术已被研究和应用于从水中去除抗生素污染物。对于 PS 技术的应用，研究和评估不同的活化系统是至关重要的。本工作研究了 Fe-AC 复合活化过硫酸盐热、光和非均相催化剂降解阿莫西林（AMX）的情况，并比较了动力学、机制和毒性。Fe-AC 体系的表观活化能低于热体系。电子顺磁共振（EPR）光谱和猝灭试验证明存在羟基自由基和硫酸根自由基。在热、光和 Fe-AC 体系中分别检测到 22、21 和 13 种降解中间体。在三种活化 PS 体系中提出并比较了 AMX 降解的 6 种途径。通过生态结构-活性关系模型和毒性评估软件工具预测了不同处理过程中降解中间体的毒性。通过 Acinetobacter baylyi ADP1_recA 测试了 AMX 降解溶液的遗传毒性，结果表明 Fe-AC/PS 体系处理后的 AMX 溶液几乎没有遗传毒性。在大多数情况下，Fe-AC/PS 体系相对于热或光活化 PS 体系具有明显的优势，表明 Fe-AC/PS 体系适用于水溶液中 AMX 污染的修复。
