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Introduction of Bifunctional Groups into Mesoporous Silica for Enhancing Uptake of Thorium(IV) from Aqueous Solution
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; Zhang, J; Zhao, YL; Chai, ZF; Shi, WQ; Liu YL(刘雅兰); Li ZJ(李子杰); Chu SQ(储胜启); Zheng LR(郑黎荣); Zhang J(张静); Zhao YL(赵宇亮); Chai ZF(柴之芳); Shi WQ(石伟群)
2014
Source PublicationACS APPLIED MATERIALS & INTERFACES
ISSN1944-8244
EISSN1944-8252
Volume6Issue:7Pages:4786-4796
AbstractThe 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.
Keywordmesoporous silica bifunctionality phosphonate amino thorium sorption
Subject AreaScience & Technology - Other Topics; Materials Science
DOI10.1021/am405584h
Indexed BySCI
Language英语
WOS IDWOS:000334572800024
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/224779
Collection院士
多学科研究中心
Recommended Citation
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.
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