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DOI	10.1016/j.jhazmat.2021.128164
	Insights into sorption speciation of uranium on phlogopite: Evidence from TRLFS and DFT calculation
	Pan, Duoqiang; Zhao, Xiaodong; Wang, Peng; Li, Ping; Li, Yuhong; Wu, Wangsuo; Wang, Zheming; Fan, Qiaohui
通讯作者	Pan, DQ (通讯作者)，Lanzhou Univ, Frontiers Sci Ctr Rare Isotopes, Lanzhou 730000, Peoples R China.
发表日期	2022
ISSN	0304-3894
EISSN	1873-3336
卷号	427
英文摘要	Knowledge of the sorption speciation of uranium at mineral/water interface is essential to construct reliable retention and migration models. In this work, the sorption speciation of U(VI) at the phlogopite/water interface was studied at trace concentrations by combining batch sorption, time-resolved luminescence spectroscopy, and theoretical calculation. Batch experiments showed that the sorption of U(VI) on phlogopite was strongly dependent on pH but weakly affected by ionic strength, implying that the inner-sphere surface complexation was mainly responsible for U(VI) sorption on phlogopite. The diverse luminescence spectral characteristics indicated the formation of multiple inner-sphere surface species at the phlogopite/water interface, whose abundances varied as a function of pH. A portion of U(VI) precipitated as uranyl oxyhydroxides such as metaschoepite and becquerelite at high pH. Density functional theory calculation revealed that the bidentate complex at the edge of phlogopite ( AlO-MgO-UO2(H2O)(3)) was the most favorable sorption configuration for U(VI) at acidic condition. The increasing temperature enhanced the sorption of U(VI) on phlogopite without altering the sorption species, and such enhancement in U(VI) sorption was withdrawn once the temperature decreased. These findings are essential for understanding the immobilization mechanism of U(VI) in mica-rich granitic terrains at a molecular scale and building a reliable retention model.
关键词	X-RAY-ABSORPTION URANYL ADSORPTION FLUORESCENCE SPECTROSCOPY U(VI) SORPTION SURFACE MUSCOVITE EU(III)BATCH MONTMORILLONITE TEMPERATURE
英文关键词	Uranium; Sorption; Speciation; Phlogopite
语种	英语
WOS研究方向	Engineering ; Environmental Sciences & Ecology
WOS类目	Engineering, Environmental ; Environmental Sciences
WOS记录号	WOS:000752478900001
来源期刊	JOURNAL OF HAZARDOUS MATERIALS
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254237
作者单位	[Pan, Duoqiang; Wu, Wangsuo] Lanzhou Univ, Frontiers Sci Ctr Rare Isotopes, Lanzhou 730000, Peoples R China; [Pan, Duoqiang; Zhao, Xiaodong; Wang, Peng; Li, Yuhong] Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China; [Li, Ping; Fan, Qiaohui] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China; [Wang, Zheming] Pacific Northwest Natl Lab, Richland, WA 99352 USA
推荐引用方式 GB/T 7714	Pan, Duoqiang,Zhao, Xiaodong,Wang, Peng,et al. Insights into sorption speciation of uranium on phlogopite: Evidence from TRLFS and DFT calculation[J]. 中国科学院西北生态环境资源研究院,2022,427.
APA	Pan, Duoqiang.,Zhao, Xiaodong.,Wang, Peng.,Li, Ping.,Li, Yuhong.,...&Fan, Qiaohui.(2022).Insights into sorption speciation of uranium on phlogopite: Evidence from TRLFS and DFT calculation.JOURNAL OF HAZARDOUS MATERIALS,427.
MLA	Pan, Duoqiang,et al."Insights into sorption speciation of uranium on phlogopite: Evidence from TRLFS and DFT calculation".JOURNAL OF HAZARDOUS MATERIALS 427(2022).