Interfacial Engineering Improved the Selective Extraction of Uranyl from Saline Water by Nano-Mg(OH)(2) and the Underlying Mechanism

doi:10.1021/acssuschemeng.5b00840

IHEP OpenIR

	Interfacial Engineering Improved the Selective Extraction of Uranyl from Saline Water by Nano-Mg(OH)(2) and the Underlying Mechanism
	Zhuang, ZY; Ou, XW; Li JY(李敬源); Li, JY; Zhou, Y; Zhang, ZH; Dong, SF; Lin, Z
	2016
发表期刊	ACS SUSTAINABLE CHEMISTRY & ENGINEERING (IF:5.951[JCR-2016],6.079[5-Year])
ISSN	2168-0485
卷号	4 期号:3 页码:801-809
文章类型	Article
摘要	Abundant salts and complex constituents pose challenges to the enrichment of trace-level uranyl from field water samples. On the basis of the chemical behavior of the uranyl cation in several physical chemical conditions (in the presence of MgCl2 etc.), we developed a facile and green strategy to improve the uranyl extraction from field water samples, different from the traditional way with organic impregnation. In our systems about nano-Mg(OH)(2) treating salt lake brine, when the adsorbent is pretreated with a trace amount of UO22+ ion, the ability to extract uranyl from brine can increase by 2-5 times. The molecular dynamics simulation and time-resolved laser-induced fluorescence spectroscopy analysis show that, in the preadsorption stage, UO22+ ions can steadily bind to the Mg(OH)(2) (001) surface because of the interaction with surface hydroxyl groups. When pretreated Mg(OH)2 was exposed to brine, the coordination interaction between the preloaded UO22+ ion and the [UO2(CO3)(x)((2x-2)-)] in solution engenders good selectivity and affinity for uranyl over competitive ions in brine. Besides, the coordination number of UO22+ by carbonate oxygen is large, which further facilitates subsequent adsorption. Such strategy does not introduce other impurities and can apply to metal-oxides-type adsorbents, e.g., TiO2. This study should shed light on further improvement of efficient uranyl extraction from field samples and give insights into the mechanism understanding of uranyl adsorption in real systems.
关键词	Uranyl Mg(OH)(2) Low concentration Nanoadsorbents Molecular dynamics simulation Selectivity Adsorption
DOI	10.1021/acssuschemeng.5b00840
收录类别	SCI
语种	英语
WOS记录号	WOS:000371755400023
引用统计	正在获取...
文献类型	期刊论文
条目标识符	https://ir.ihep.ac.cn/handle/311005/247929
专题	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Zhuang, ZY,Ou, XW,Li JY,et al. Interfacial Engineering Improved the Selective Extraction of Uranyl from Saline Water by Nano-Mg(OH)(2) and the Underlying Mechanism[J]. ACS SUSTAINABLE CHEMISTRY & ENGINEERING,2016,4(3):801-809.
APA	Zhuang, ZY.,Ou, XW.,李敬源.,Li, JY.,Zhou, Y.,...&Lin, Z.(2016).Interfacial Engineering Improved the Selective Extraction of Uranyl from Saline Water by Nano-Mg(OH)(2) and the Underlying Mechanism.ACS SUSTAINABLE CHEMISTRY & ENGINEERING,4(3),801-809.
MLA	Zhuang, ZY,et al."Interfacial Engineering Improved the Selective Extraction of Uranyl from Saline Water by Nano-Mg(OH)(2) and the Underlying Mechanism".ACS SUSTAINABLE CHEMISTRY & ENGINEERING 4.3(2016):801-809.