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Enhanced sequestration of Cr(VI) by nanoscale zero-valent iron supported on layered double hydroxide by batch and XAFS study

文献类型：期刊论文

作者Sheng, Guodong1,2; Hu, Jun4; Li, Hui1; Li, Jiaxing2; Huang, Yuying3
刊名CHEMOSPHERE
出版日期2016-04-01
卷号148期号:无页码:227-232
关键词Nanoscale Zero-valent Iron Cr(Vi) Layered Double Hydroxides Synergistic Effect X-ray Absorption Fine Structure (Xafs) Spectra
DOI10.1016/j.chemosphere.2016.01.035
文献子类Article
英文摘要Herein, the reduction of nanoscale zero-valent iron (NZVI) and adsorption of layered double hydroxides (LDH) to sequester Cr(VI) were well combined by the immobilization of NZVI onto LDH surface (NZVI/LDH). The characterization results revealed that LDH decreased NZVI aggregation and thus increased Cr(VI) sequestration. The batch results indicated that Cr(VI) sequestration by NZVI/LDH was higher than that of NZVI, and superior to the sum of reduction and adsorption. The LDH with good anion exchange property allowed the adsorption of Cr(VI), facilitating interfacial reaction by increasing the local concentration of Cr(VI) in the NZVI vicinity. X-ray absorption near edge structure (XANES) results indicated that Cr(VI) was almost completely reduced to Cr(III) by NZVI/LDH, but Cr(VI) was partly reduced to Cr(III) by NZVI with a trace of Cr(VI) adsorbed on corrosion products. The coordination environment of Cr from extended X-ray absorption fine structure (EXAFS) analysis revealed that LDH could be a good scavenger for the insoluble products produced during reaction. So, the insoluble products on NZVI could be reduced, and its reactivity could be maintained. These results demonstrated that NZVI/LDH exhibits multiple functionalities relevant to the remediation of Cr(VI)-contaminated sites. (C) 2016 Elsevier Ltd. All rights reserved.
WOS关键词HUMIC SUBSTANCE INTERACTION ; OXIDE WATER INTERFACE ; HEXAVALENT CHROMIUM ; ZEROVALENT IRON ; WASTE-WATER ; AQUEOUS-SOLUTIONS ; REMOVAL ; REDUCTION ; ADSORPTION ; KINETICS
WOS研究方向Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000371099700027
资助机构National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; 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) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; National Natural Science Foundation of China(21207092 ; 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) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093)
源URL[http://ir.hfcas.ac.cn/handle/334002/21438]  
专题合肥物质科学研究院_中科院等离子体物理研究所
作者单位1.Shaoxing Univ, Coll Med Sci, Coll Chem & Chem Engn, Hangzhou 312000, Zhejiang, Peoples R China
2.Chinese Acad Sci, Inst Plasma Phys, POB 1126, Hefei 230031, Peoples R China
3.Chinese Acad Sci, Shanghai Inst Appl Phys, SSRF, Shanghai 201204, Peoples R China
4.Dongguan Univ Technol, Sch Elect Engn, Guangzhou 523808, Guangdong, Peoples R China
推荐引用方式
GB/T 7714		 Sheng, Guodong,Hu, Jun,Li, Hui,et al. Enhanced sequestration of Cr(VI) by nanoscale zero-valent iron supported on layered double hydroxide by batch and XAFS study[J]. CHEMOSPHERE,2016,148(无):227-232.
APA Sheng, Guodong,Hu, Jun,Li, Hui,Li, Jiaxing,&Huang, Yuying.(2016).Enhanced sequestration of Cr(VI) by nanoscale zero-valent iron supported on layered double hydroxide by batch and XAFS study.CHEMOSPHERE,148(无),227-232.
MLA Sheng, Guodong,et al."Enhanced sequestration of Cr(VI) by nanoscale zero-valent iron supported on layered double hydroxide by batch and XAFS study".CHEMOSPHERE 148.无(2016):227-232.

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来源：合肥物质科学研究院

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