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

ISL OpenIR > 青海盐湖研究所知识仓储

	Interfacial Engineering Improved the Selective Extraction of Uranyl from Saline Water by Nano-Mg(OH)(2) and the Underlying Mechanism
	Zhuang, Zanyong 1; Ou, Xinwen 1; Li, Jingyuan 2; Zhou, Yuan3 ; Zhang, Zhihong3 ; Dong, Shengfa 3; Lin, Zhang 1,4
	2016-03-01
发表期刊	ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷号	4 期号:3 页码:801-809
关键词	Uranyl Mg(Oh)(2) Low Concentration Nanoadsorbents Molecular Dynamics Simulation Selectivity Adsorption
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.
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/6303
专题	青海盐湖研究所知识仓储盐湖资源与化学实验室
作者单位	1.Chinese Acad Sci, Fujian Inst Res Struct Matter, Key Lab Design & Assembly Funct Nanostruct, Fuzhou 350002, Fujian, Peoples R China 2.Chinese Acad Sci, Inst High Energy Phys, CAS Key Lab Biomed Effects Nanomat & Nanosafety, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Qinghai, Peoples R China 4.S China Univ Technol, Sch Environm & Energy, Guangzhou 510006, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Zhuang, Zanyong,Ou, Xinwen,Li, Jingyuan,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, Zanyong.,Ou, Xinwen.,Li, Jingyuan.,Zhou, Yuan.,Zhang, Zhihong.,...&Lin, Zhang.(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, Zanyong,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.