Introduction of Bifunctional Groups into Mesoporous Silica for Enhancing Uptake of Thorium(IV) from Aqueous Solution

	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
刊名	ACS APPLIED MATERIALS & INTERFACES
	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
内容类型	期刊论文
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.