兰州大学机构库 >核科学与技术学院
Different biosorption mechanisms of Uranium(VI) by live and heat-killed Saccharomyces cerevisiae under environmentally relevant conditions
Wang, TS(王铁山); Zheng, Xinyan; Wang, Xiaoyu; Lu, Xia; Shen, Yanghao
2017
Source PublicationJOURNAL OF ENVIRONMENTAL RADIOACTIVITY   Impact Factor & Quartile
ISSN0265-931X
Volume167Pages:92-99
AbstractUranium adsorption mechanisms of live and heat-killed Saccharomyces cerevisiae in different pH values and biomass concentrations were studied under environmentally relevant conditions. Compared with live cells, the adsorption capacity of heat-killed cells is almost one order of magnitude higher in low biomass concentration and highly acidic pH conditions. To explore the mesoscopic surface interactions between uranium and cells, the characteristic of uranium deposition was investigated by SEM-EDX, XPS and FTIR Biosorption process of live cells was considered to be metabolism-dependent. Under stimulation by uranyl ions, live cells could gradually release phosphorus and reduce uranium from U(VI) to U(IV) to alleviate uranium toxicity. The uranyl-phosphate complexes were formed in scale-like shapes on cell surface. The metabolic detoxification mechanisms such as reduction and "self-protection" are of significance to the migration of radionuclides. In the metabolism-independent biosorption process of heat-killed cells: the cells cytomembrane was damaged by autoclaving which led to the free diffusion of phosphorous from intracellular, and the rough surface and nano-holes indicated that the dead cells provided larger contact area to precipitate U(VI) as spherical nano-particles. The high biosorption capacity of heat-killed cells makes it become a suitable biological adsorbent for uranium removal. (C) 2016 Elsevier Ltd. All rights reserved.
KeywordSaccharomyces cerevisiae Bioremediation Biosorption capacity Uranium waste treatment Detoxification mechanisms
Subject AreaEnvironmental Sciences & Ecology
PublisherELSEVIER
DOI10.1016/j.jenvrad.2016.11.018
Publication PlaceOXFORD
Indexed ByEI ; SCIE ; PubMed ; MEDLINE
Language英语
First Inst
WOS IDWOS:000392779000013
EI Accession Number20170103208746
SubtypeArticle
EI KeywordsBioremediation ; Biosorption ; Cell membranes ; Cytology ; Detoxification ; Metabolism ; Nanoparticles ; pH ; Phosphorus ; Waste treatment ; Yeast
EI Classification NumberIndustrial Wastes Treatment and Disposal:452.4 ; Environmental Impact and Protection:454.2 ; Biological Materials and Tissue Engineering:461.2 ; Biology:461.9 ; Nanotechnology:761 ; Chemistry, General:801.1 ; Chemical Products Generally:804 ; Food Products:822.3 ; Solid State Physics:933
Original Document TypeJournal article (JA)
PMID 27913083
IRIDWOS:000392779000013
Citation statistics
Cited Times:64[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/189188
Collection核科学与技术学院
Corresponding AuthorZheng, Xinyan
Affiliation
School of Nuclear Science and Technology, Lanzhou University, NO.222, Tianshui South Road, Chengguan District, Lanzhou; 730000, China
First Author AffilicationSchool of Nuclear Science and Technology
Corresponding Author AffilicationSchool of Nuclear Science and Technology
Recommended Citation
GB/T 7714
Wang, Tieshan,Zheng, Xinyan,Wang, Xiaoyu,et al. Different biosorption mechanisms of Uranium(VI) by live and heat-killed Saccharomyces cerevisiae under environmentally relevant conditions[J]. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY,2017,167:92-99.
APA Wang, Tieshan,Zheng, Xinyan,Wang, Xiaoyu,Lu, Xia,&Shen, Yanghao.(2017).Different biosorption mechanisms of Uranium(VI) by live and heat-killed Saccharomyces cerevisiae under environmentally relevant conditions.JOURNAL OF ENVIRONMENTAL RADIOACTIVITY,167,92-99.
MLA Wang, Tieshan,et al."Different biosorption mechanisms of Uranium(VI) by live and heat-killed Saccharomyces cerevisiae under environmentally relevant conditions".JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 167(2017):92-99.
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