Effects of ZnO nanoparticles on aerobic denitrification by strain   Pseudomonas stutzeri PCN-1

doi:10.1016/j.biortech.2017.04.123

CORC > 北京大学 > 环境科学与工程学院

	Effects of ZnO nanoparticles on aerobic denitrification by strain Pseudomonas stutzeri PCN-1
	Chen, Qian ; Li, Tingting ; Gui, Mengyao ; Liu, Shufeng ; Zheng, Maosheng ; Ni, Jinren
刊名	BIORESOURCE TECHNOLOGY
	2017
关键词	Aerobic denitrification ZnO nanoparticles Pseudomonas stutzeri Gene expression ROS METAL-OXIDE NANOPARTICLES WASTE-WATER TREATMENT ZINC-OXIDE HETEROTROPHIC NITRIFICATION ANTIBACTERIAL PROPERTIES ANTIMICROBIAL ACTIVITY DENITRIFYING BACTERIA OXYGEN CONCENTRATION PHOSPHORUS REMOVAL TOXICITY
DOI	10.1016/j.biortech.2017.04.123
英文摘要	Anaerobic denitrification has been proved to be negatively affected by ZnO nanomaterials (NPs), but little is known about how ZnO NPs affects aerobic denitrification. In this study, inhibition of ZnO NPs to an aerobic denitrifier, Pseudomonas stutzeri PCN-1, was firstly reported. The results showed total nitrogen removal efficiency was decreased from 100% to 1.70% with the increase of ZnO NPs from 1 to 128 mg/L. The presence of ZnO NPs caused significant inhibition of gene expressions and catalytic activities of nitrate reductase and nitrite reductase, which finally led to delayed nitrate reduction and high nitrite accumulation. Further studies revealed that the deposition of nanoparticles on the bacterial surface caused by electrostatic forces and the generation of reactive oxygen species (ROS) were responsible for the cytotoxicity of ZnO NPs, where ROS played a more important role. These results were of significance to evaluating the potential ecological toxicity and risks of nanomaterials. (C) 2017 Elsevier Ltd. All rights reserved.; National Natural Science Foundation of China [51539001, 51208007]; special foundation from the Yellow River Institute of Hydraulic Research [HKY-JBYW-2016-01]; SCI(E); ARTICLE; 21-27; 239
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/471306]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Chen, Qian,Li, Tingting,Gui, Mengyao,et al. Effects of ZnO nanoparticles on aerobic denitrification by strain Pseudomonas stutzeri PCN-1[J]. BIORESOURCE TECHNOLOGY,2017.
APA	Chen, Qian,Li, Tingting,Gui, Mengyao,Liu, Shufeng,Zheng, Maosheng,&Ni, Jinren.(2017).Effects of ZnO nanoparticles on aerobic denitrification by strain Pseudomonas stutzeri PCN-1.BIORESOURCE TECHNOLOGY.
MLA	Chen, Qian,et al."Effects of ZnO nanoparticles on aerobic denitrification by strain Pseudomonas stutzeri PCN-1".BIORESOURCE TECHNOLOGY (2017).