College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China; Key Laboratory of Hangzhou City for Ecosystem Protection and Restoration, Hangzhou Normal University, Hangzhou 310036, China.
College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China; Key Laboratory of Hangzhou City for Ecosystem Protection and Restoration, Hangzhou Normal University, Hangzhou 310036, China.
Bioresour Technol. 2018 Oct;266:11-18. doi: 10.1016/j.biortech.2018.06.052. Epub 2018 Jun 19.
The increasing use of engineered metal oxide nanoparticles (MONPs) in consumer products raises great concerns about their environmental impacts, but their potential impacts on anaerobic ammonium oxidation (anammox) process in wastewater treatment remain unclear. In this study, the presence of MONPs (1, 50, 200 mg L) exhibited no visible effects on the nitrogen removal performance of anammox reactors, but high levels (200 mg L) of SiONPs, AlONPs and CeONPs had a distinct effect on shaping the anammox community. Long-term exposure of MONPs caused different responses in the relative abundance of Ca. Kuenenia, the level of functional gene HzsA and the activities of three key enzymes involved in anammox metabolism, but no significant inhibition effects on specific anammox activity were detected. Overall, the effects of MONPs on anammox community structure and sludge properties depended on their types and levels and followed the order SiO > CeO > AlO > TiO.
越来越多的工程金属氧化物纳米粒子（MONPs）被应用于消费产品，这引发了人们对其环境影响的极大关注，但它们对废水处理中厌氧氨氧化（anammox）过程的潜在影响仍不清楚。在本研究中，MONPs（1、50、200mg/L）的存在对 anammox 反应器的氮去除性能没有明显影响，但高浓度（200mg/L）的 SiONPs、AlONPs 和 CeONPs 对 anammox 群落的形成有明显影响。长期暴露于 MONPs 会导致 Ca. Kuenenia 的相对丰度、HzsA 功能基因水平和参与 anammox 代谢的三种关键酶的活性产生不同的反应，但没有检测到对特定 anammox 活性的显著抑制作用。总体而言，MONPs 对 anammox 群落结构和污泥性质的影响取决于它们的类型和浓度，并遵循 SiO > CeO > AlO > TiO 的顺序。
