Decontamination of U(VI) from nZVI/CNF composites investigated by batch, spectroscopic and modeling techniques
Hu, BW; Mei, X; Li, X; Hu, J; Xu, D; Ma, JY; Huang, YY
2017
发表期刊JOURNAL OF MOLECULAR LIQUIDS
ISSN0167-7322
卷号237期号:-页码:1-9
文章类型期刊论文
摘要The nZVI/CNF composites were synthesized by borohydride reduction of ferrous salts in the CNF suspension. The characteristic results indicated that metallic Fe-0 was uniformly dispersed the surface of CNFs. The decontamination mechanism of U(VI) from nZVI/CNF composites was investigated by batch, XPS, EXAFS and modeling techniques. The batch experiments indicated that removal amount of U(VI) on nZVI/CNF was significantly higher than that of single nZVI, whereas reduction amount of U(VI) to U(IV) on nZVI at pH> 6.0 was significantly higher than that of nZVI/CNF. The EXAFS spectra of U-nZVI at pH 7.0 was similar to the (UO2)-O-(Iv)(s), whereas the EXAFS spectra of U-nZVI/CNF at 2.98 A can be satisfactorily fitted by U-U shell, which was further demonstrated by XANES analysis and surface complexation modeling. The diffuse layer model gave better fits to U(VI) removal on nZVI/CNFs composites, whereas underestimation of U(VI) removal on nZVI was observed at pH > 5.0 due to the presence of reductive precipitation. These findings indicated that nZVI-based composites presented the higher adsorption performance and the excellent reduction capacity for U(VI) under permeable reactive barrier system. (C) 2017 Elsevier B.V. All rights reserved.
关键词Zero-valent Iron Nanoscale Zerovalent Iron Ray Photoelectron-spectroscopy Fine-structure Spectroscopy Layered Double Hydroxide In-situ Bioreduction Carbonaceous Nanofibers Enhanced Sequestration Competitive Sorption Bacillus-subtilis
DOI10.1016/j.molliq.2017.04.084
关键词[WOS]ZERO-VALENT IRON ; NANOSCALE ZEROVALENT IRON ; RAY PHOTOELECTRON-SPECTROSCOPY ; FINE-STRUCTURE SPECTROSCOPY ; LAYERED DOUBLE HYDROXIDE ; IN-SITU BIOREDUCTION ; CARBONACEOUS NANOFIBERS ; ENHANCED SEQUESTRATION ; COMPETITIVE SORPTION ; BACILLUS-SUBTILIS
收录类别SCI
语种英语
WOS记录号WOS:000403510900001
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/28596
专题中科院上海应用物理研究所2011-2018年
推荐引用方式
GB/T 7714
Hu, BW,Mei, X,Li, X,et al. Decontamination of U(VI) from nZVI/CNF composites investigated by batch, spectroscopic and modeling techniques[J]. JOURNAL OF MOLECULAR LIQUIDS,2017,237(-):1-9.
APA Hu, BW.,Mei, X.,Li, X.,Hu, J.,Xu, D.,...&Huang, YY.(2017).Decontamination of U(VI) from nZVI/CNF composites investigated by batch, spectroscopic and modeling techniques.JOURNAL OF MOLECULAR LIQUIDS,237(-),1-9.
MLA Hu, BW,et al."Decontamination of U(VI) from nZVI/CNF composites investigated by batch, spectroscopic and modeling techniques".JOURNAL OF MOLECULAR LIQUIDS 237.-(2017):1-9.
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