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The enhancement roles of layered double hydroxide on the reductive immobilization of selenate by nanoscale zero valent iron: Macroscopic and microscopic approaches

文献类型：期刊论文

作者Hu, Baowei1; Ye, Feng1; Jin, Chengan1; Ma, Xiangxian3; Huang, Chengcai1; Sheng, Guodong1,2,5; Ma, Jingyuan4; Wang, Xiangke1,2,6; Huang, Yuying4
刊名CHEMOSPHERE
出版日期2017-10-01
卷号184页码:408-416
关键词Layered double hydroxide Nanoscale zero-valent iron Enhancement roles Se(VI) immobilization X-ray absorption fine structure
ISSN号0045-6535
DOI10.1016/j.chemosphere.2017.05.179
文献子类Article
英文摘要Herein, 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.
WOS关键词SUPPORTED ZEROVALENT IRON ; WEAK MAGNETIC-FIELD ; AQUEOUS-SOLUTION ; HEXAVALENT CHROMIUM ; SELENIUM REDUCTION ; PLASMA TECHNIQUE ; CR(VI) REMOVAL ; GRANULAR IRON ; WASTE-WATER ; SEQUESTRATION
WOS研究方向Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000407525500047
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构Natural Science Foundation of Zhejiang Province(LY15B070001) ; National Natural Science Foundation of China(21577093 ; 21207092) ; Natural Science Foundation of Zhejiang Province(LY15B070001) ; National Natural Science Foundation of China(21577093 ; 21207092) ; Natural Science Foundation of Zhejiang Province(LY15B070001) ; National Natural Science Foundation of China(21577093 ; 21207092) ; Natural Science Foundation of Zhejiang Province(LY15B070001) ; National Natural Science Foundation of China(21577093 ; 21207092)
源URL[http://ir.iggcas.ac.cn/handle/132A11/61894]  
专题地质与地球物理研究所_兰州油气中心
通讯作者Sheng, Guodong
作者单位1.Shaoxing Univ, Coll Life 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.Key Lab Petr Resources, Lanzhou 730000, Gansu, Peoples R China
4.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China
5.Chinese Acad Sci, Inst Plasma Phys, POB 1126, Hefei 230031, Anhui, Peoples R China
6.King Abdulaziz Univ, NAAM Res Grp, Fac Sci, Jeddah 21589, Saudi Arabia
推荐引用方式
GB/T 7714		 Hu, Baowei,Ye, Feng,Jin, Chengan,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, Baowei.,Ye, Feng.,Jin, Chengan.,Ma, Xiangxian.,Huang, Chengcai.,...&Huang, Yuying.(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, Baowei,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.

入库方式： OAI收割

来源：地质与地球物理研究所

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