Institutional Repository of Chinese Academy of Sciences, Institute of Plasma Physics, Hefei 230031, Anhui, Peoples R China
| 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, Guodong1,2; Yang, Pengjie1; Tang, Yanna1; Hu, Qingyuan1; Li, Hui1; Ren, Xuemei4 ; Hu, Baowei1; Wang, Xiangke1,2; Huang, Yuying3
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| 2016-09-15 | |
| 发表期刊 | APPLIED CATALYSIS B-ENVIRONMENTAL
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| 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. |
| 文章类型 | Article |
| 关键词 | Diatomite Nanoscale Zero Valent Iron Enhanced u(Vi) Sequestration Primary Roles |
| WOS标题词 | Science & Technology ; Physical Sciences ; Technology |
| DOI | 10.1016/j.apcatb.2016.04.035 |
| 关键词[WOS] | 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 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 项目资助者 | National Natural Science Foundation of China(21577093 ; National Natural Science Foundation of China(21577093 ; National Natural Science Foundation of China(21577093 ; National Natural Science Foundation of China(21577093 ; National Natural Science Foundation of China(21577093 ; National Natural Science Foundation of China(21577093 ; National Natural Science Foundation of China(21577093 ; National Natural Science Foundation of China(21577093 ; National Natural Science Foundation of China(21577093 ; National Natural Science Foundation of China(21577093 ; National Natural Science Foundation of China(21577093 ; National Natural Science Foundation of China(21577093 ; National Natural Science Foundation of China(21577093 ; National Natural Science Foundation of China(21577093 ; National Natural Science Foundation of China(21577093 ; National Natural Science Foundation of China(21577093 ; Natural Science Foundation of Zhejiang Province(LY15B070001) ; Natural Science Foundation of Zhejiang Province(LY15B070001) ; Natural Science Foundation of Zhejiang Province(LY15B070001) ; Natural Science Foundation of Zhejiang Province(LY15B070001) ; Natural Science Foundation of Zhejiang Province(LY15B070001) ; Natural Science Foundation of Zhejiang Province(LY15B070001) ; Natural Science Foundation of Zhejiang Province(LY15B070001) ; Natural Science Foundation of Zhejiang Province(LY15B070001) ; Natural Science Foundation of Zhejiang Province(LY15B070001) ; Natural Science Foundation of Zhejiang Province(LY15B070001) ; Natural Science Foundation of Zhejiang Province(LY15B070001) ; Natural Science Foundation of Zhejiang Province(LY15B070001) ; Natural Science Foundation of Zhejiang Province(LY15B070001) ; Natural Science Foundation of Zhejiang Province(LY15B070001) ; Natural Science Foundation of Zhejiang Province(LY15B070001) ; Natural Science Foundation of Zhejiang Province(LY15B070001) ; 21207092) ; 21207092) ; 21207092) ; 21207092) ; 21207092) ; 21207092) ; 21207092) ; 21207092) ; 21207092) ; 21207092) ; 21207092) ; 21207092) ; 21207092) ; 21207092) ; 21207092) ; 21207092) |
| WOS研究方向 | Chemistry ; Engineering |
| WOS类目 | Chemistry, Physical ; Engineering, Environmental ; Engineering, Chemical |
| WOS记录号 | WOS:000377234800020 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.hfcas.ac.cn:8080/handle/334002/21842 |
| 专题 | 中科院等离子体物理研究所 |
| 作者单位 | 1.Shaoxing Univ, Coll Yuanpei Coll Med Sci, Coll Chem & Chem Engn, Shaoxing 312000, Zhejiang, Peoples R China 2.North China Elect Power Univ, Sch Chem & Environm, Beijing 102206, Peoples R China 3.Chinese Acad Sci, Shanghai Inst Appl Phys, SSRF, Shanghai 201204, Peoples R China 4.Chinese Acad Sci, Inst Plasma Phys, POB 1126, Hefei 230031, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sheng, Guodong,Yang, Pengjie,Tang, Yanna,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(无):189-197. |
| APA | Sheng, Guodong.,Yang, Pengjie.,Tang, Yanna.,Hu, Qingyuan.,Li, Hui.,...&Huang, Yuying.(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(无),189-197. |
| MLA | Sheng, Guodong,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.无(2016):189-197. |
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