CAS OpenIR  > 中科院上海应用物理研究所2011-2019年
Synthesis, characterization and application of lanthanum-impregnated activated alumina for F removal
Shi, Qiantao; Huang, Yuying; Jing, Chuanyong
2013
Source PublicationJOURNAL OF MATERIALS CHEMISTRY A
ISSN2050-7488
Volume1Issue:41Pages:CONCATENATE(Sheet1!I349,-Sheet1!J349)
AbstractElevated fluoride (F) in groundwater presents an obvious environmental concern. Adsorption using activated alumina (AA) is currently the best available technology for F removal, despite its low efficiency, pH dependence, and aluminium (Al) release. The motivation for our study is to synthesise a new F adsorbent by impregnating commercially available granulated AA with lanthanum oxide (LAA), and to explore its F adsorption mechanism on the molecular scale. Five cycles of lanthanum impregnation on AA followed by calcination at 573 K increased the La content up to 19.1% and the F removal from 18.1% by pristine AA to 92.4% by LAA. The SEM, TEM, XRD, TGA, and EXAFS results demonstrated that the 5-20 nm thin flakes of LaOOH on LAA were in an amorphous form, with 7.6 oxygen atoms around each La. This LaOOH layer was uniformly distributed inside the micropores of the 1-3 mm AA granules. LAA exhibited four fold higher F adsorption capacity than AA in the pH range 3.9 to 9.6, with substantially reduced Al release. The ability to regenerate and reuse LAA makes it an attractive sustainable material. Multiple complementary spectroscopic analyses demonstrated that ligand exchange between F and surface hydroxyl groups is the mechanism for F adsorption on LAA. Our work improves the understanding of F interaction with metal oxides on the molecular scale and presents an alternative solution for elevated F water treatment.
Indexed BySCI
Language英语
Funding Project应物所项目组
WOS IDWOS:000325413000015
Citation statistics
Cited Times:23[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/13643
Collection中科院上海应用物理研究所2011-2019年
Recommended Citation
GB/T 7714
Shi, Qiantao,Huang, Yuying,Jing, Chuanyong. Synthesis, characterization and application of lanthanum-impregnated activated alumina for F removal[J]. JOURNAL OF MATERIALS CHEMISTRY A,2013,1(41):CONCATENATE(Sheet1!I349,-Sheet1!J349).
APA Shi, Qiantao,Huang, Yuying,&Jing, Chuanyong.(2013).Synthesis, characterization and application of lanthanum-impregnated activated alumina for F removal.JOURNAL OF MATERIALS CHEMISTRY A,1(41),CONCATENATE(Sheet1!I349,-Sheet1!J349).
MLA Shi, Qiantao,et al."Synthesis, characterization and application of lanthanum-impregnated activated alumina for F removal".JOURNAL OF MATERIALS CHEMISTRY A 1.41(2013):CONCATENATE(Sheet1!I349,-Sheet1!J349).
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