摘要
      三氯卡班（TCC）在新冠肺炎疫情爆发后市场需求量巨大，成为一种新兴污染物。然而，TCC对硝化颗粒污泥系统性能的影响以及抗生素抗性基因（ARGs）的发生仍然未知。本工作探讨了不同浓度的TCC对硝化颗粒污泥的影响。结果表明，TCC抑制了氨氧化微生物的活性，降低了氮螺旋菌的丰度。吸附是去除TCC的主要途径，在加入19.70mg/L TCC的条件下，TCC的生物降解效率提高到28.00%。TCC富集了ARGs，并增加了它们在微生物中转移的风险。假单胞菌不仅对TCC有很强的抗性，而且可以繁殖ARGs。TCC和细菌群落的去除过程是促进ARGs传播的重要因素。因此，TCC的存在带来了巨大的环境风险。
Abstract
Triclocarban (TCC) is in great market demand especially after the outbreak of COVID-19 pandemic, becoming an emerging pollutant. However, the impacts of TCC on the performance of nitrifying granular sludge system and the occurrence of antibiotic resistance genes (ARGs) were still unknown. This work explored the impacts of different concentrations of TCC on nitrifying granular sludge. Results showed that TCC suppressed the activities of ammonia-oxidizing microorganisms and decreased the abundance of Nitrospira. Adsorption was the main way for the removal of TCC and the biodegradation efficiency of TCC increased to 28.00% under 19.70 mg/L TCC addition. TCC enriched the ARGs and promoted the risks of their transferring in microorganisms. Pseudomonas might not only have strong resistance to TCC, but also propagate ARGs. The removal process of TCC and bacterial communities were important factors to promote the spread of ARGs. Thus, the existence of TCC presented a great environmental risk.

https://www.sciencedirect.com/science/article/abs/pii/S0960852421017715