ICCAS OpenIR
Performance and mechanism of Mg/Fe layered double hydroxides for fluoride and arsenate removal from aqueous solution
Kang, Dongjuan1; Yu, Xiaolin1; Tong, Shengrui1; Ge, Maofa1; Zuo, Junchao1; Cao, Changyan2; Song, Weiguo2
2013-07-15
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume228Pages:731-740
AbstractThe present study evaluated calcined Mg/Fe layered double hydroxide (Mg/Fe-CLDH) as an adsorbent for simultaneous removal of fluoride and arsenate from aqueous solution. The Mg/Fe layered double hydroxide (Mg/Fe-LDH) was synthesized by co-precipitation method. A series of batch experiments were performed under various conditions, such as M2+/M3+ ratio, calcination temperature, initial anions concentrations, contact time, solution pH and competitive adsorption, for the adsorption of fluoride and arsenate on Mg/Fe-CLDH. It was found that the Mg/Fe-CLDH adsorbent with a M2+/M3+ ratio of 5, calcined at 400 degrees C and pH 7, had the largest adsorption capacity of 50.91 and 50.24 mg/g for fluoride and arsenate, respectively. Data of equilibrium experiments were fitted well to Langmuir isotherm model and pseudo-second-order kinetic model. Competitive adsorption experiments indicated that the Mg/Fe-CLDH adsorbents can achieve the simultaneous removal of fluoride and arsenate. The adsorbents were characterized by BET, SEM, XRD, FT-IR and XPS, and the analysis results demonstrated that the adsorption mechanism involved surface adsorption, ion exchange interaction and original LDH structure reconstruction by rehydration of mixed metal oxides and concomitant intercalation of fluoride and arsenate ions into the interlayer region. (C) 2013 Elsevier B.V. All rights reserved.
KeywordFluoride Arsenate Layered Double Hydroxide Adsorption Mechanism Aqueous Solution
DOI10.1016/j.cej.2013.05.041
Indexed BySCI
Language英语
WOS IDWOS:000326203500079
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:131[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/42014
Collection中国科学院化学研究所
Corresponding AuthorTong, Shengrui
Affiliation1.Chinese Acad Sci, Inst Chem, BNLMS, State Key Lab Struct Chem Unstable & Stable Speci, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Chem, Lab Mol Nanostruct & Nanotechnol, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Kang, Dongjuan,Yu, Xiaolin,Tong, Shengrui,et al. Performance and mechanism of Mg/Fe layered double hydroxides for fluoride and arsenate removal from aqueous solution[J]. CHEMICAL ENGINEERING JOURNAL,2013,228:731-740.
APA Kang, Dongjuan.,Yu, Xiaolin.,Tong, Shengrui.,Ge, Maofa.,Zuo, Junchao.,...&Song, Weiguo.(2013).Performance and mechanism of Mg/Fe layered double hydroxides for fluoride and arsenate removal from aqueous solution.CHEMICAL ENGINEERING JOURNAL,228,731-740.
MLA Kang, Dongjuan,et al."Performance and mechanism of Mg/Fe layered double hydroxides for fluoride and arsenate removal from aqueous solution".CHEMICAL ENGINEERING JOURNAL 228(2013):731-740.
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