| 石墨烯包覆氮化碳掺杂铁酸铜活化PMS同步去除水中抗生素抗性菌、抗性基因并抑制其水平转移的机制 |
| 摘要点击 1166 全文点击 167 投稿时间：2024-01-18 修订日期：2024-04-08 |
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| 中文关键词 过硫酸盐活化 铁酸铜复合材料 单线态氧 抗生素抗性基因（ARGs） 基因水平转移 |
| 英文关键词 persulfate activation copper ferrite composite material singlet oxygen antibiotic resistance genes（ARGs） horizontal transfer |
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| 中文摘要 |
| 抗生素抗性菌（ARB）和抗性基因（ARGs）作为新兴污染物,严重威胁着人类健康和生态安全. 通过冷冻干燥法制备了还原性氧化石墨烯（rGO）包覆的g-C3N4掺杂铁酸铜催化材料（rGO-CNCF）,通过XRD、FTIR、XPS、SEM-EDS、TEM和DRS等分析手段对复合材料进行了表征,并构建了可见光助rGO-CNCF活化PMS系统,用于水中ARB和ARGs的去除. 结果表明,在催化剂投加量为0.2 g·L-1,PMS投加量为0.3 g·L-1,溶液初始pH值为7.0时,30 min内Vis-rGO-CNCF/PMS高级氧化系统可实现对8.01 log SA-ARB的完全灭活. 该系统能够有效降低SA-ARGs的水平转移能力,对于胞内和胞外游离态的SA-ARGs具有良好的破坏能力. 同时,该高级氧化体系可以实现对水体中磺胺类抗生素及其ARB和ARGs的协同处理. 该系统可以破坏ARB的细胞膜结构,使细胞破碎,淬灭实验表明,起主要作用的活性物质是单线态氧（1O2）. 研究结果可以为处理水中的ARB和ARGs污染及控制ARGs的水平转移提供一种有前景的方法. |
| 英文摘要 |
| As emerging contaminants, antibiotic-resistant bacteria （ARBs） and antibiotic-resistant genes （ARGs） pose a serious threat to human health and ecological security. Here, a reduced graphene oxide and g-C3N4 co-doped copper ferrite （rGO-CNCF） were synthesized. The composite material was characterized using XRD, FTIR, XPS, SEM-EDS, TEM, and DRS analysis methods, and a visible-light-assisted rGO-CNCF-activated PMS system was constructed for the removal of ARB and ARGs in water. The results showed that the complete inactivation of 8.01 log SA-ARB could be achieved within 30 min when the catalyst dosage was 0.2 g·L-1, The PMS dosage was 0.3 g·L-1, and the initial pH value of the solution was 7.0. The Vis-rGO-CNCF/PMS system was able to effectively reduce the horizontal transfer of SA-ARGs, and this system had a good destructive ability for intracellular and extracellular SA-ARGs. The destruction ability of the advanced oxidation process for the two pollutants together, SMT and SA-ARB, was maintained at a high level. This system could destroy the cell membrane structure of resistant bacteria, causing cell fragmentation, and quenching experiments showed that singlet oxygen （1O2） played a major role in the system. This study can provide a promising method for controlling ARB and ARG pollution in water and controlling the horizontal transfer of ARGs. |
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