DE FG02-06ER64193: Final Technical Report Nucleation and Precipitation Processes in the Vadose Zone during Contaminant Transport | Zendy

Kathryn L. Nagy | Zendy

Open Access

DE FG02-06ER64193: Final Technical Report Nucleation and Precipitation Processes in the Vadose Zone during Contaminant Transport

Author(s) -

Kathryn L. Nagy

Publication year - 2012

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/1045138

Subject(s) - uranium , precipitation , oxidizing agent , silicate , aqueous solution , chemistry , fourier transform infrared spectroscopy , mineralogy , nucleation , soil water , silicate minerals , nitrate , environmental chemistry , materials science , chemical engineering , geology , metallurgy , physics , organic chemistry , meteorology , soil science , engineering

The report describes results of experiments to synthesize and characterize uranium(VI)-silicates from solutions containing dissolved U(VI), Si, Na, and nitrate as a function of solution pH and Si:U ratio under ambient conditions. Solids characterization was accomplished by X-ray diffraction, attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), and high-energy X-ray scattering (HEXS) analysis. The purpose was to develop a framework for describing the formation of U(VI)-silicate solids that might form in contaminated soils and sediments under oxidizing conditions in the presence of aqueous uranium, and are known to exist naturally in geologic uranium deposits

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