National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China.
National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China.
Bioresour Technol. 2022 Mar;347:126429. doi: 10.1016/j.biortech.2021.126429. Epub 2021 Nov 25.
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.
三氯卡班（TCC）在新冠疫情爆发后需求量巨大，成为一种新兴的污染物。然而，TCC 对硝化颗粒污泥系统性能和抗生素抗性基因（ARGs）的产生的影响尚不清楚。本研究探索了不同浓度 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，降低了硝化螺旋菌的丰度。TCC 的去除主要是通过吸附作用，当 TCC 添加量为 19.70mg/L 时，TCC 的生物降解效率增加到 28.00%。TCC 富集了 ARGs，并促进了其在微生物中的转移风险。假单胞菌不仅对 TCC 具有很强的抗性，而且还可以传播 ARGs。TCC 的去除过程和细菌群落是促进 ARGs 传播的重要因素。因此，TCC 的存在带来了巨大的环境风险。
