Ligand-exchange mechanism: new insight into solid-phase extraction of uranium based on a combined experimental and theoretical study

Physical Chemistry Chemical Physics : PCCP
Yin TianChong Zheng

Abstract

In numerous reports on selective solid-phase extraction (SPE) of uranium, the extraction of uranium is generally accepted as a direct coordination of the ligands on the solid matrix with the uranyl, in which the critical effect of the hydration shell on the uranyl is neglected. The related mechanism in the extraction process remains unclear. Herein, the detailed calculation of activation energy and the geometry of the identified transition states reveal that the uranium extraction by a newly-synthesized urea-functionalized graphite oxide (Urea-GO) is in essence an exchange process between the ligands on Urea-GO and the coordinated water molecules in the first hydration shell of the uranyl. Moreover, we demonstrate that it is the ketone oxygen in the urea ligand to displace the coordinated water molecule of uranyl due to its stronger bonding ability and lower steric-hindrance, whereas the nitrogen atom in the same ligand is proved to be an electron donor that enables the oxygen atom to have stronger affinity for uranium through electron delocalization effects evaluated on the basis of calculations of the second-order interaction energy between donor and acceptor orbitals. We therefore propose a new ligand-exchange mechanism for ...Continue Reading

References

Mar 15, 2003·Analytical and Bioanalytical Chemistry·Susan SadeghiYadollah Yamini
Apr 1, 2003·Journal of Computational Chemistry·Maurizio CossiVincenzo Barone
Jul 6, 2005·Analytical and Bioanalytical Chemistry·L SoderholmJ Neuefeind
Sep 30, 2005·Journal of the American Chemical Society·Michael BühlGeorges Wipff
Feb 17, 2006·Physical Chemistry Chemical Physics : PCCP·Alain Chaumont, Georges Wipff
May 11, 2006·Journal of the American Chemical Society·Michael BühlGeorges Wipff
Nov 13, 2007·Inorganic Chemistry·Satoru TsushimaAndreas C Scheinost
Apr 2, 2008·The Journal of Chemical Physics·Patrick NicholsWibe de Jong
Jun 30, 2009·Journal of Hazardous Materials·Xin HuangBi Shi
Oct 23, 2009·The Journal of Physical Chemistry. B·Manori Jayasinghe, Thomas L Beck
Oct 23, 2010·Physical Chemistry Chemical Physics : PCCP·Xianggui YeBamin Khomami
Feb 25, 2011·Journal of Hazardous Materials·Thazhathuparambil Elias MiljaTalasila Prasada Rao
Sep 27, 2012·Journal of the American Chemical Society·Manolis J Manos, Mercouri G Kanatzidis
Oct 15, 2001·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·L SémonG Wipff
Mar 7, 2014·The Journal of Physical Chemistry. a·Qun-Yan WuWei-Qun Shi

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Citations

Feb 20, 2016·Journal of Mass Spectrometry : JMS·Yi LiHuanwen Chen
Jan 19, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Chuting YangSheng Hu
Mar 1, 2018·Nanoscale Horizons : the Home for Rapid Reports of Exceptional Significance in Nanoscience and Nanotechnolgy·Yang LiLijian Ma
Jul 17, 2019·Environmental Pollution·Jie DingChuanqin Xia
Aug 6, 2019·ACS Applied Materials & Interfaces·Briana AguilaShengqian Ma

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