Microbial Transformation of Multiwalled Carbon Nanotubes by   Mycobacterium vanbaalenii PYR-1

doi:10.1021/acs.est.6b04523

CORC > 北京大学 > 城市与环境学院

	Microbial Transformation of Multiwalled Carbon Nanotubes by Mycobacterium vanbaalenii PYR-1
	You, Yaqi ; Das, Kamol K. ; Guo, Huiyuan ; Chang, Che-Wei ; Navas-Moreno, Maria ; Chan, James W. ; Verburg, Paul ; Poulson, Simon R. ; Wang, Xilong ; Xing, Baoshan ; Yang, Yu
刊名	ENVIRONMENTAL SCIENCE & TECHNOLOGY
	2017
关键词	RAMAN-SPECTROSCOPY NANOMATERIALS BIODEGRADATION BACTERIA CYTOTOXICITY DEGRADATION ENVIRONMENT PEROXIDASE PATHWAY GROWTH
DOI	10.1021/acs.est.6b04523
英文摘要	Carbonaceous nanomaterials are widely used in industry and consumer products, but concerns have been raised regarding their release into the environment and subsequent impacts on ecosystems and human health. Although many efforts have been devoted to understanding the environmental fate of carbonaceous nanomaterials, information about their microbial transformation is still rare. In this study, we found that within 1 month a polycyclic aromatic hydrocarbon-degrading bacterium, Mycobacterium vanbaalenii PYR-1, was able to degrade both pristine and carboxyl-functionalized multiwalled carbon nanotubes (p-MWCNT and c-MWCNT), as demonstrated by consistent results from high resolution transmission electron microscopy, Raman spectroscopy, and confocal Raman microspectroscopy. Statistical analysis of Raman spectra identified a significant increase in the density of disordered or amorphous carbon in p-MWCNT and c-MVVCNT after biodegradation. Microbial respiration further suggested potential mineralization of MWCNTs within about 1 month. All of our analyses consistently showed higher degradation or mineralization of c-MWCNT compared to p-MWCNT. These results highlight the potential of using bacteria in engineered systems to remove residual carbonaceous nanomaterials and reduce risk of human exposure and environmental impact. Meanwhile, our finding suggests possible transformation of carbonaceous nanomaterials by polycyclic aromatic hydrocarbon-degrading bacteria in the natural environment, which should be accounted for in predicting the environmental fate of these emerging contaminants and in nanotechnology risk regulation.; USDA [2015-67018-23120]; DOE [DE-SC0014275]; University of Nevada Reno (a Startup fund); NSFC [41629101]; SCI(E); ARTICLE; 4; 2068-2076; 51
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/475065]
专题	城市与环境学院
推荐引用方式 GB/T 7714	You, Yaqi,Das, Kamol K.,Guo, Huiyuan,et al. Microbial Transformation of Multiwalled Carbon Nanotubes by Mycobacterium vanbaalenii PYR-1[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2017.
APA	You, Yaqi.,Das, Kamol K..,Guo, Huiyuan.,Chang, Che-Wei.,Navas-Moreno, Maria.,...&Yang, Yu.(2017).Microbial Transformation of Multiwalled Carbon Nanotubes by Mycobacterium vanbaalenii PYR-1.ENVIRONMENTAL SCIENCE & TECHNOLOGY.
MLA	You, Yaqi,et al."Microbial Transformation of Multiwalled Carbon Nanotubes by Mycobacterium vanbaalenii PYR-1".ENVIRONMENTAL SCIENCE & TECHNOLOGY (2017).