Introduction of Bifunctional Groups into Mesoporous Silica for Enhancing Uptake of Thorium(IV) from Aqueous Solution
文献类型：期刊论文
| 作者 | Yuan LY(袁立永) ; Bai ZQ(白志强); Zhao R(赵然); Yuan, LY; Bai, ZQ; Zhao, R; Liu, YL; Li, ZJ; Chu, SQ; Zheng, LR
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| 刊名 | ACS APPLIED MATERIALS & INTERFACES
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| 出版日期 | 2014 |
| 卷号 | 6期号:7页码:4786-4796 |
| 关键词 | mesoporous silica bifunctionality phosphonate amino thorium sorption |
| 英文摘要 | The potential industrial application of thorium (Th), as well as the environmental and human healthy problems caused by thorium, promotes the development of reliable methods for the separation and removal of Th(IV) from environmental and geological samples. Herein, the phosphonate-amino bifunctionalized mesoporous silica (PAMS) was fabricated by a one-step self-assembly approach for enhancing Th(IV) uptake from aqueous solution. The synthesized sorbent was found to possess ordered mesoporous structures with uniform pore diameter and large surface area, characterized by SEM, XRD, and N-2 sorption/desorption measurements. The enhancement of Th(IV) uptake by PAMS was achieved by coupling of an access mechanism to a complexation mechanism, and the sorption can be optimized by adjusting the coverage of the functional groups in the PAMS sorbent. The systemic study on Th(IV) sorption/desorption by using one coverage of PAMS (PAMS12) shows that the Th(IV) sorption by PAMS is fast with equilibrium time of less than 1 h, and the sorption capacity is more than 160 mg/g at a relatively low pH. The sorption isotherm has been successfully modeled by the Langmuir isotherm and D-R isotherm, which reveals a monolayer homogeneous chemisorption of Th(IV) in PAMS. The Th(IV) sorption by PAMS is pH dependent but ionic strength independent. In addition, the sorbed Th(IV) can be completely desorbed using 0.2 mol/L or more concentrated nitric acid solution. The Sorption test performed in the solution containing a range of competing metal ions suggests that the PAMS sorbent has a desirable selectivity for Th(IV) ions. |
| 学科主题 | Science & Technology - Other Topics; Materials Science |
| 收录类别 | SCI |
| WOS记录号 | WOS:000334572800024 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/224779]  |
| 专题 | 高能物理研究所_院士 高能物理研究所_多学科研究中心 |
| 推荐引用方式 GB/T 7714 | Yuan LY,Bai ZQ,Zhao R,et al. Introduction of Bifunctional Groups into Mesoporous Silica for Enhancing Uptake of Thorium(IV) from Aqueous Solution[J]. ACS APPLIED MATERIALS & INTERFACES,2014,6(7):4786-4796. |
| APA | 袁立永.,白志强.,赵然.,Yuan, LY.,Bai, ZQ.,...&石伟群.(2014).Introduction of Bifunctional Groups into Mesoporous Silica for Enhancing Uptake of Thorium(IV) from Aqueous Solution.ACS APPLIED MATERIALS & INTERFACES,6(7),4786-4796. |
| MLA | 袁立永,et al."Introduction of Bifunctional Groups into Mesoporous Silica for Enhancing Uptake of Thorium(IV) from Aqueous Solution".ACS APPLIED MATERIALS & INTERFACES 6.7(2014):4786-4796. |
入库方式： OAI收割
来源：高能物理研究所
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