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Reduction of hexavalent chromium by Pannonibacter phragmitetus LSSE-09 coated with polyethylenimine-functionalized magnetic nanoparticles under alkaline conditions
Xu, Lin1,2,3; Yang, Liangrong1,2; Luo, Mingfang3; Liang, Xiangfeng1,2; Wei, Xuetuan1,2,3; Zhao, Junmei1,2; Liu, Huizhou1,2; Liu, HZ
2011-05-30
Source PublicationJOURNAL OF HAZARDOUS MATERIALS
ISSN0304-3894
Volume189Issue:3Pages:787-793
AbstractA novel cell separation and immobilization method for Cr (VI)-reduction under alkaline conditions was developed by using superparamagnetic Fe3O4 nanoparticles (NPs). The Fe3O4 NPs were synthesized by coprecipitation followed by modification with sodium citrate and polyethyleneimine (PEI). The surface-modified NPs were monodispersed and the particle size was about 15 nm with a saturation magnetization of 62.3 emu/g and an isoelectric point (pl) of 11.5 at room temperature. PEI-modified Fe3O4 NPs possess positive zeta potential at pH below 11.5. presumable because of the high density of amine groups in the long chains of PEI molecules on the surface. At initial pH 9.0, Pannonibacter phragmitetus LSSE-09 cells were immobilized by PEI-modified NPs via electrostatic attraction and then separated with an external magnetic field. Compared to free cells, the coated cells not only had the same Cr (VI)-reduction activity but could also be easily separated from reaction mixtures by magnetic force. In addition, the magnetically immobilized cells retained high specific Cr (VI)-reduction activity over six batch cycles. he results suggest that the magnetic cell separation technology has potential application for Cr (VI) detoxification in alkaline wastewater. (C) 2011 Elsevier B.V. All rights reserved.
KeywordCr (Vi) Reduction Fe3o4 Nanoparticles Polyethyleneimine Superparamagnetic Electrostatic Attraction
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Life Sciences & Biomedicine
DOI10.1016/j.jhazmat.2011.03.009
Indexed BySCI
Language英语
WOS KeywordCHROMATE REDUCTION ; ESCHERICHIA-COLI ; MICROBIAL-CELLS ; HEAVY-METALS ; DELIVERY ; REMOVAL ; BIOMASS ; CR(VI) ; GENE ; POLY(ETHYLENIMINE)
WOS Research AreaEngineering ; Environmental Sciences & Ecology
WOS SubjectEngineering, Environmental ; Engineering, Civil ; Environmental Sciences
WOS IDWOS:000291912200021
Citation statistics
Cited Times:30[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/4889
Collection湿法冶金清洁生产技术国家工程实验室
Corresponding AuthorLiu, HZ
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Natl Key Lab Biochem Engn, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Xu, Lin,Yang, Liangrong,Luo, Mingfang,et al. Reduction of hexavalent chromium by Pannonibacter phragmitetus LSSE-09 coated with polyethylenimine-functionalized magnetic nanoparticles under alkaline conditions[J]. JOURNAL OF HAZARDOUS MATERIALS,2011,189(3):787-793.
APA Xu, Lin.,Yang, Liangrong.,Luo, Mingfang.,Liang, Xiangfeng.,Wei, Xuetuan.,...&Liu, HZ.(2011).Reduction of hexavalent chromium by Pannonibacter phragmitetus LSSE-09 coated with polyethylenimine-functionalized magnetic nanoparticles under alkaline conditions.JOURNAL OF HAZARDOUS MATERIALS,189(3),787-793.
MLA Xu, Lin,et al."Reduction of hexavalent chromium by Pannonibacter phragmitetus LSSE-09 coated with polyethylenimine-functionalized magnetic nanoparticles under alkaline conditions".JOURNAL OF HAZARDOUS MATERIALS 189.3(2011):787-793.
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