Laboratory of Water Pollution Remediation, School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China.
Laboratory of Water Pollution Remediation, School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China.
Bioresour Technol. 2020 Jul;307:123264. doi: 10.1016/j.biortech.2020.123264. Epub 2020 Mar 27.
Nanoparticles and antibiotics, the two most frequently detected emerging pollutants from different wastewater sources, are eventually discharged into wastewater treatment plants. In this study, the widely used materials CuNPs and oxytetracycline (OTC) were selected as target pollutants to investigate their joint effects on anaerobic ammonium oxidation (anammox). The results indicated that the environmental concentration slightly inhibited the performance of the reactors, while the performance rapidly deteriorated within a week under high-level combined shocks (5.0 mg L CuNPs and 2.0 mg L OTC). After the second shock (2.5 mg L CuNPs and 2.0 mg L OTC), the resistance of anammox bacteria was enhanced, with an elevated relative abundance of Candidatus Kuenenia and absolute abundance of hzsA, nirS, and hdh. Moreover, the extracellular polymeric substance (EPS) content and specific anammox activity (SAA) showed corresponding changes. Improved sludge resistance was observed with increasing CuNP and OTC doses, which accelerated the recovery of performance.
纳米颗粒和抗生素是两种最常从不同废水源中检测到的新兴污染物，最终会被排放到污水处理厂。在本研究中，选择了广泛使用的材料铜纳米颗粒和土霉素（OTC）作为目标污染物，以研究它们对厌氧氨氧化（anammox）的联合影响。结果表明，环境浓度轻微抑制了反应器的性能，而在高水平联合冲击（5.0mg/L 铜纳米颗粒和 2.0mg/L OTC）下，一周内性能迅速恶化。在第二次冲击（2.5mg/L 铜纳米颗粒和 2.0mg/L OTC）后，anammox 细菌的抗性增强，Candidatus Kuenenia 的相对丰度和 hzsA、nirS 和 hdh 的绝对丰度升高。此外，胞外聚合物（EPS）含量和特定 anammox 活性（SAA）也呈现出相应的变化。随着铜纳米颗粒和 OTC 剂量的增加，污泥的抗性得到了提高，这加速了性能的恢复。
