CAS OpenIR  > 中科院上海应用物理研究所2011-2019年
The enhancement roles of layered double hydroxide on the reductive immobilization of selenate by nanoscale zero valent iron: Macroscopic and microscopic approaches
Hu, BW; Ye, F; Jin, CA; Ma, XX; Huang, CC; Sheng, GD; Ma, JY; Wang, XK; Huang, YY
2017
Source PublicationCHEMOSPHERE
ISSN0045-6535
Volume184Issue:-Pages:408-416
Subtype期刊论文
AbstractHerein, we utilized nanoscale zero-valent iron loaded on layered double hydroxide (NZVI/LDH) to immobilize Se(VI) and evaluated the enhancement role of LDH in the NZVI reaction system. The structural characterization indicated that LDH could stabilize and disperse NZVI as well as prevent NZVI from oxidation, thereby increasing iron reactivity. Batch experiments displayed that, compared with those by NZVI, both extent and rate of Se(VI) immobilized by NZVI/LDH significantly increased, owing to the prominent synergistic effect ascribing from adsorption and reduction. Kinetics studies under a series of conditions showed that Se(VI) reaction could be well described by pseudo first-order model. The performance of Se(VI) immobilization was inhibited to a considerable extent by most of co-existing ions, Nevertheless, the presence of Cu2+ improved performance of NZVI/LDH due to its role as a catalyst or medium of charge transfer during reduction. CANES revealed that LDH acted as a promoter for complete reduction of Se(VI) into Se(0)/Se(-II) over a wide pH range, whereas EXAFS suggested that LDH acted as a scavenger for insoluble products, making more reactive sites exposure to Se(VI) for reduction. These results suggested that NZVI/LDH as a promising candidate exhibited potential application in remediation of wastewaters containing Se(VI). (C) 2017 Elsevier Ltd. All rights reserved.
KeywordSupported Zerovalent Iron Weak Magnetic-field Aqueous-solution Hexavalent Chromium Selenium Reduction Plasma Technique Cr(Vi) Removal Granular Iron Waste-water Sequestration
DOI10.1016/j.chemosphere.2017.05.179
Indexed BySCI
WOS KeywordSUPPORTED ZEROVALENT IRON ; WEAK MAGNETIC-FIELD ; AQUEOUS-SOLUTION ; HEXAVALENT CHROMIUM ; SELENIUM REDUCTION ; PLASMA TECHNIQUE ; CR(VI) REMOVAL ; GRANULAR IRON ; WASTE-WATER ; SEQUESTRATION
Language英语
WOS IDWOS:000407525500047
Citation statistics
Cited Times:27[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/28861
Collection中科院上海应用物理研究所2011-2019年
Recommended Citation
GB/T 7714
Hu, BW,Ye, F,Jin, CA,et al. The enhancement roles of layered double hydroxide on the reductive immobilization of selenate by nanoscale zero valent iron: Macroscopic and microscopic approaches[J]. CHEMOSPHERE,2017,184(-):408-416.
APA Hu, BW.,Ye, F.,Jin, CA.,Ma, XX.,Huang, CC.,...&Huang, YY.(2017).The enhancement roles of layered double hydroxide on the reductive immobilization of selenate by nanoscale zero valent iron: Macroscopic and microscopic approaches.CHEMOSPHERE,184(-),408-416.
MLA Hu, BW,et al."The enhancement roles of layered double hydroxide on the reductive immobilization of selenate by nanoscale zero valent iron: Macroscopic and microscopic approaches".CHEMOSPHERE 184.-(2017):408-416.
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