Uranyl sorption by smectites: spectroscopic assessment of thermodynamic modeling

Journal of Colloid and Interface Science
C J Chisholm-BrauseD E Morris

Abstract

Batch sorption experiments and thermodynamic modeling of the interaction of UO2(2+) and its hydrolysis products with two smectitic clay minerals, the reference material SWy-1 [McKinley et al., Clays Clay Miner. 43 (1995) 586] and the soil isolate LK-1 [Turner et al., Geochim. Cosmochim. Acta 30 (1996) 3399], have established a conceptual framework for uranyl/smectite surface complexation based on general reactions between aqueous uranyl species and the reactive sites on the mineral surfaces. In this report, we have formulated and spectroscopically tested a set of hypotheses based on this conceptual framework using samples prepared under similar or identical conditions to evaluate the agreement between surface complexation/speciation as enumerated by spectroscopic characterization and that elaborated by the surface complexation model. Both steady-state and time-resolved optical emission spectral data are presented for uranyl on both smectite minerals as well as on the analogue phases SiO2 and Al(OH)3 spanning the pH range from approximately 4 to 8 and the background electrolyte concentrations from approximately 0.001 to 0.1 M. The spectral data enable the explicit identification of an outer-sphere exchange-site population of the...Continue Reading

References

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Dec 9, 2000·Journal of Colloid and Interface Science·C J Chisholm-BrauseD E Morris
Feb 19, 2002·Chemical Reviews·Gordon E. BrownJohn M. Zachara
Jun 14, 2003·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Sebastião J FormosinhoMohamed Sarakha

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Citations

Feb 1, 2013·Chemical Reviews·Horst GeckeisMoritz Schmidt
Mar 29, 2011·Physical Chemistry Chemical Physics : PCCP·Jean-François Boily, Kevin M Rosso
Mar 10, 2012·Physical Chemistry Chemical Physics : PCCP·Alena KremlevaNotker Rösch
Mar 3, 2009·Journal of Colloid and Interface Science·G García-RosalesE Simoni
Nov 20, 2014·Dalton Transactions : an International Journal of Inorganic Chemistry·Jan TitsErich Wieland
Dec 2, 2014·Dalton Transactions : an International Journal of Inorganic Chemistry·Hui WangDongqi Wang
Nov 19, 2010·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Xiaoli TanXiangke Wang
Oct 9, 2020·Journal of Environmental Radioactivity·Claude Degueldre, Steve McGowan
Aug 7, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Alena KremlevaNotker Rösch
Nov 21, 2009·Environmental Science & Technology·Zhenqing ShiBaolin Deng
Apr 1, 2006·Environmental Science & Technology·Hyun-Shik ChangJohn M Zachara

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