New insights into the primary roles of diatomite in the enhanced sequestration of UO22+ by zerovalent iron nanoparticles: An advanced approach utilizing XPS and EXAFS

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	New insights into the primary roles of diatomite in the enhanced sequestration of UO22+ by zerovalent iron nanoparticles: An advanced approach utilizing XPS and EXAFS
	Sheng, GD; Yang, PJ; Tang, YN; Hu, QY; Li, H; Ren, XM; Hu, BW; Wang, XK; Huang, YY
刊名	APPLIED CATALYSIS B-ENVIRONMENTAL
	2016
卷号	193 期号:-页码:189—197
关键词	ZERO-VALENT IRON IN-SITU REMEDIATION HUMIC SUBSTANCE INTERACTION PERMEABLE REACTIVE BARRIER ANOXIC BATCH SYSTEMS WEAK MAGNETIC-FIELD AQUEOUS-SOLUTION URANIUM REMOVAL WASTE-WATER CARBON NANOTUBES
ISSN号	0926-3373
通讯作者	Sheng, GD ; Hu, BW (reprint author), Shaoxing Univ, Coll Yuanpei Coll Med Sci, Coll Chem & Chem Engn, Shaoxing 312000, Zhejiang, Peoples R China. ; Sheng, GD (reprint author), North China Elect Power Univ, Sch Chem & Environm, Beijing 102206, Peoples R China.
英文摘要	In the current paper, nanoscale zero-valent iron (NZVI) was immobilized onto the negatively-charged diatomite to obtain a novel composite (NZVI-D) for the enhanced sequestration of uranyl (U(VI)) in water. The as-synthesized NZVI-D was characterized by SEM, TEM and XRD in detail, and better dispersion of NZVI on diatomite surface was observed, as compared with bare NZVI. The efficiency of U(VI) sequestration by NZVI-D was compared with that of commercial iron and bare NZVI. It was found that NZVI-D exhibits the best efficiency in U(VI) sequestration, showing obvious synergistic effect between diatomite adsorption and NZVI reduction. The primary roles were further revealed by complementary macroscopic and spectroscopic studies. XPS results indicated that reduction of highly toxic and mobile UO22+ into less toxic and mobile UO2 could be enhanced using diatomite-supported NZVI. EXAFS analysis demonstrated that diatomite could react as a scavenger for insoluble products like UO2, and thus more reactive sites could be used for U(VI) reduction. Besides, diatomite play multiple roles on pH buffering and preventing NZVI from aggregating and as adsorbent of Fe(II) produced in-situ during reaction for further U(VI) reduction. This study opens a new avenue for the practical application of NZVI and NZVI-D in environmental remediation. (C) 2016 Elsevier B.V. All rights reserved.
收录类别	SCI
语种	英语
WOS记录号	WOS:000377234800020
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/25785]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
推荐引用方式 GB/T 7714	Sheng, GD,Yang, PJ,Tang, YN,et al. New insights into the primary roles of diatomite in the enhanced sequestration of UO22+ by zerovalent iron nanoparticles: An advanced approach utilizing XPS and EXAFS[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2016,193(-):189—197.
APA	Sheng, GD.,Yang, PJ.,Tang, YN.,Hu, QY.,Li, H.,...&Huang, YY.(2016).New insights into the primary roles of diatomite in the enhanced sequestration of UO22+ by zerovalent iron nanoparticles: An advanced approach utilizing XPS and EXAFS.APPLIED CATALYSIS B-ENVIRONMENTAL,193(-),189—197.
MLA	Sheng, GD,et al."New insights into the primary roles of diatomite in the enhanced sequestration of UO22+ by zerovalent iron nanoparticles: An advanced approach utilizing XPS and EXAFS".APPLIED CATALYSIS B-ENVIRONMENTAL 193.-(2016):189—197.