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Insights into adsorption mechanism for fluoride on cactus-like amorphous alumina oxide microspheres
Kang, Dongjuan1,2; Yu, Xiaolin2,3; Ge, Maofa2,3,4; Lin, Mengya2,3; Yang, Xueqin2,3; Jing, Yuanyuan2

Cactus-like amorphous alumina microspheres (CA-AlOx) were fabricated by a facile solvothermal method without templates. The as-prepared CA-AlOx material exhibited the amorphous structure which is beneficial to the large specific surface area, developed pore structure, abundant functional groups and high reactivity of coordinatively unsaturated Al species. The maximum adsorption capacity of CA-AlOx was calculated to be 129.4 mg/g for fluoride, which was higher than that of many adsorbents reported. Moreover, the CA-AlOx exhibited fast adsorption rate, high interference resistance and good reusable ability. Adsorption mechanism and relationship between amorphous structure and adsorption performance for fluoride on the CA-AlOx were investigated systematically by various characterization techniques. The adsorption mechanism of fluoride on the CA-AlOx was mainly through the chemical coordination of unsaturated Al-species AlO4 and AlO5 by fluoride ions to form the AlF3 and [AlF6](3-) species by XPS and NMR analysis. Also, ion exchange, electrostatic adsorption and pore filling were also involved in the adsorption process. These results suggested that the CA-AlOx has great application potential for deep purification of fluoride-contaminated drinking water.

KeywordFluoride Amorphous Alumina Adsorption Mechanism
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
WOS KeywordLayered Double Hydroxides ; Metal Ion Removal ; Drinking-water ; Aqueous-solution ; Efficient Removal ; Enhanced Removal ; Graphene Oxides ; Adsorbent ; Performance ; Composite
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
Funding OrganizationNational Natural Science Foundation of China(21407152 ; China Postdoctoral Science Foundation(2017M611001) ; 21590811 ; 21777166)
WOS IDWOS:000430696500026
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Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Chem, CAS Res Educ Ctr Excellence Mol Sci, State Key Lab Struct Chem Unstable & Stable Speci, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China
Recommended Citation
GB/T 7714
Kang, Dongjuan,Yu, Xiaolin,Ge, Maofa,et al. Insights into adsorption mechanism for fluoride on cactus-like amorphous alumina oxide microspheres[J]. CHEMICAL ENGINEERING JOURNAL,2018,345:252-259.
APA Kang, Dongjuan,Yu, Xiaolin,Ge, Maofa,Lin, Mengya,Yang, Xueqin,&Jing, Yuanyuan.(2018).Insights into adsorption mechanism for fluoride on cactus-like amorphous alumina oxide microspheres.CHEMICAL ENGINEERING JOURNAL,345,252-259.
MLA Kang, Dongjuan,et al."Insights into adsorption mechanism for fluoride on cactus-like amorphous alumina oxide microspheres".CHEMICAL ENGINEERING JOURNAL 345(2018):252-259.
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