Synthesis, characterization and application of lanthanum-impregnated activated alumina for F removal
文献类型：期刊论文
| 作者 | Shi, Qiantao ; Huang, Yuying ; Jing, Chuanyong |
| 刊名 | JOURNAL OF MATERIALS CHEMISTRY A
 |
| 出版日期 | 2013 |
| 卷号 | 1期号:41页码:CONCATENATE(Sheet1!I349,-Sheet1!J349) |
| ISSN号 | 2050-7488 |
| 英文摘要 | Elevated 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. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000325413000015 |
| 公开日期 | 2014-06-13 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/13643]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 推荐引用方式 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). |
入库方式： OAI收割
来源：上海应用物理研究所
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