Adsorption of extracellular polymeric substances from two microbes by TiO2 nanoparticles

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Adsorption of extracellular polymeric substances from two microbes by TiO2 nanoparticles
	Gao, Xuan ; Middepogu, Ayyaraju ; Deng, Rui ; Liu, Jingfu 2; Hao, Zhineng 2; Lin, Daohui 1
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2019-12-01
卷号	694 页码:-
关键词	Nanomaterial Sorption Bio-nano interaction Algae Bacteria
ISSN号	0048-9697
英文摘要	Extracellular polymeric substance (EPS) secreted by microbes can interact with nanoparticles (NPs) and thus influence environmental behavior and toxicity of NPs. The adsorption of EPSs from two species of microbes (Escherichia coli and Chlorella pyrenoidosa) by four types of titanium dioxide nanoparticles (nTiO(2)) (5, 10, and 40 nm anatase nTiO(2) and 25 nm rutile nTiO(2)) were therefore specifically investigated. Results show that the adsorption kinetics and thermodynamics were dependent on sources and chemical properties of EPSs. EPS (20 mg C/L) from Escherichia coli mainly composed of protein (86%) with relatively higher molecular weight and aromaticity and more active functional groups (i.e., N-H and -COOH) was effectively removed (>90%) by adsorption on nTiO(2) (100 mg and more), while much less (<40%) EPS from Chlorella pyrenoidosa with a main component of polysaccharide (68%) was adsorptively removed. The Fourier transform ion cyclotron resonance mass spectrometry analysis revealed the selective adsorption of aromatic components of EPSs by nTiO(2). The EPS adsorption capacity of nTiO(2) linearly increased with the specific surface area of the NPs. The rutile nTiO(2) with the smallest specific surface area had the highest EPS adsorption per unit surface area. These findings promote a deeper understanding of the interaction between EPS and NPs. (C) 2019 Elsevier B.V. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/42504]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
作者单位	1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China 2.Zhejiang Univ, Dept Environm Sci, Hangzhou 310058, Zhejiang, Peoples R China 3.Zhejiang Univ, Zhejiang Prov Key Lab Organ Pollut Proc & Control, Hangzhou 310058, Zhejiang, Peoples R China
推荐引用方式 GB/T 7714	Gao, Xuan,Middepogu, Ayyaraju,Deng, Rui,et al. Adsorption of extracellular polymeric substances from two microbes by TiO2 nanoparticles[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,694:-.
APA	Gao, Xuan,Middepogu, Ayyaraju,Deng, Rui,Liu, Jingfu,Hao, Zhineng,&Lin, Daohui.(2019).Adsorption of extracellular polymeric substances from two microbes by TiO2 nanoparticles.SCIENCE OF THE TOTAL ENVIRONMENT,694,-.
MLA	Gao, Xuan,et al."Adsorption of extracellular polymeric substances from two microbes by TiO2 nanoparticles".SCIENCE OF THE TOTAL ENVIRONMENT 694(2019):-.