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Enhanced U(VI) bioreduction by alginate-immobilized uranium-reducing bacteria in the presence of carbon nanotubes and anthraquinone-2,6-disulfonate
Wang, Weida1,2; Feng, Yali1; Tang, Xinhua3; Li, Haoran2; Du, Zhuwei2; Yi, Aifei1; Zhang, Xu1
2015-05-01
Source PublicationJOURNAL OF ENVIRONMENTAL SCIENCES-CHINA
ISSN1001-0742
Volume31Issue:MAYPages:68-73
Abstract

Uranium-reducing bacteria were immobilized with sodium alginate, anthraquinone-2, 6-disulfonate (AQDS), and carbon nanotubes (CNTs). The effects of different AQDS-CNTs contents, U(IV) concentrations, and metal ions on U(IV) reduction by immobilized beads were examined. Over 97.5% U(VI) (20 mg/L) was removed in 8 hr when the beads were added to 0.7% AQDS-CNTs, which was higher than that without AQDS-CNTs. This result may be attributed to the enhanced electron transfer by AQDS and CNTs. The reduction of U(VI) occurred at initial U(VI) concentrations of 10 to 100 mg/L and increased with increasing AQDS-CNT content from 0.1% to 1%. The presence of Fe(III), Cu(II) and Mn(II) slightly increased U(VI) reduction, whereas Cr(VI), Ni(II), Pb(II), and Zn(II) significantly inhibited U(VI) reduction. After eight successive incubation-washing cycles or 8 hr of retention time (HRT) for 48 hr of continuous operation, the removal efficiency of uranium was above 90% and 92%, respectively. The results indicate that the AQDS-CNT/AL/cell beads are suitable for the treatment of uranium-containing wastewaters. (C) 2015 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.

KeywordUranium Carbon Nanotubes (Cnts) Redox Mediator Immobilization Anthraquinone-2 6-disulfonate (Aqds)
SubtypeArticle
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1016/j.jes.2014.11.005
Indexed BySCI
Language英语
WOS KeywordMEDIATED BIODEGRADATION ; ANAEROBIC REDUCTION ; CR(VI) REDUCTION ; REDOX MEDIATORS ; AZO DYES ; BIOSORPTION ; BEADS
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000355062100009
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/19245
Collection生化工程国家重点实验室
Affiliation1.Univ Sci & Technol Beijing, Civil & Environm Engn Sch, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Natl Key State Lab Biochem Engn, Beijing 100190, Peoples R China
3.Natl Univ Singapore, Dept Civil & Environm Engn, Ctr Water Res, Singapore 117576, Singapore
Recommended Citation
GB/T 7714
Wang, Weida,Feng, Yali,Tang, Xinhua,et al. Enhanced U(VI) bioreduction by alginate-immobilized uranium-reducing bacteria in the presence of carbon nanotubes and anthraquinone-2,6-disulfonate[J]. JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,2015,31(MAY):68-73.
APA Wang, Weida.,Feng, Yali.,Tang, Xinhua.,Li, Haoran.,Du, Zhuwei.,...&Zhang, Xu.(2015).Enhanced U(VI) bioreduction by alginate-immobilized uranium-reducing bacteria in the presence of carbon nanotubes and anthraquinone-2,6-disulfonate.JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,31(MAY),68-73.
MLA Wang, Weida,et al."Enhanced U(VI) bioreduction by alginate-immobilized uranium-reducing bacteria in the presence of carbon nanotubes and anthraquinone-2,6-disulfonate".JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA 31.MAY(2015):68-73.
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