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Selective adsorption of fluoride from drinking water using NiAl-layered metal oxide film electrode
Bai, Zhaoyu; Hu, Chengzhi; Liu, Huijuan; Qu, Jiuhui
2019-03-15
Source PublicationJOURNAL OF COLLOID AND INTERFACE SCIENCE
ISSN0021-9797
Volume539Pages:146-151
AbstractSelective adsorption and regeneration of adsorbents are great challenges for fluoride removal in drinking water. In this study, a NiAl-layered metal oxide (NiAl-LMO) electrode was successfully prepared and used as an electro-adsorption electrode. With its structural memory effect for anions and high specific capacitance of 575 F.g(-1), the NiAl-LMO electrode exhibits capacitive deionization performance. The maximum adsorption capacity of F- by the electrode reached 49.28 mg/g, which was 4 times that of Cl- and 2 times that of SO42-, respectively. The good selectivity for F- electrosorption was ascribed to the high electronegativity of F- and the complexation between F- and hydroxyl aluminum groups. The electrode material has good stability and can be regenerated easily by applying a reverse voltage. After 10 cycles, the F- adsorption rate by the NiAl-LMO electrode was 94. 4% of the initial adsorption rate. The applied voltage enhanced the selectivity of F- adsorption by the NiAI-LMO electrode, and this electrosorption process was mainly dominated by electrical double layer adsorption. Under the conditions of 1.0 V and pH 7, the electrode showed a maximum adsorption efficiency of 73.5%. (C) 2018 Elsevier Inc. All rights reserved.
Department环境水质学国家重点实验室
KeywordElectro-adsorption Capacitive deionization Layered metal oxide Defluorination
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/43115
Collection环境水质学国家重点实验室
Affiliation1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China
2.Hebei Univ Technol, Tianjin 300401, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Bai, Zhaoyu,Hu, Chengzhi,Liu, Huijuan,et al. Selective adsorption of fluoride from drinking water using NiAl-layered metal oxide film electrode[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2019,539:146-151.
APA Bai, Zhaoyu,Hu, Chengzhi,Liu, Huijuan,&Qu, Jiuhui.(2019).Selective adsorption of fluoride from drinking water using NiAl-layered metal oxide film electrode.JOURNAL OF COLLOID AND INTERFACE SCIENCE,539,146-151.
MLA Bai, Zhaoyu,et al."Selective adsorption of fluoride from drinking water using NiAl-layered metal oxide film electrode".JOURNAL OF COLLOID AND INTERFACE SCIENCE 539(2019):146-151.
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