nucleation and precipitation processes in the vadose zone during contaminant transport n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Nucleation and Precipitation Processes in the Vadose Zone During Contaminant Transport PowerPoint Presentation
Download Presentation
Nucleation and Precipitation Processes in the Vadose Zone During Contaminant Transport

Loading in 2 Seconds...

play fullscreen
1 / 1

Nucleation and Precipitation Processes in the Vadose Zone During Contaminant Transport - PowerPoint PPT Presentation


  • 72 Views
  • Uploaded on

Nucleation and Precipitation Processes in the Vadose Zone During Contaminant Transport. Investigators: Burcu Uyusur , Christophe Darnault - UIC Civil and Materials Engineering Department; Kathryn L. Nagy, Neil C. Sturchio , Soufiane Mekki - UIC Earth and Environmental Science Department

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Nucleation and Precipitation Processes in the Vadose Zone During Contaminant Transport' - poppy


Download Now An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
nucleation and precipitation processes in the vadose zone during contaminant transport

Nucleation and Precipitation Processes in the Vadose Zone During Contaminant Transport

Investigators: BurcuUyusur, Christophe Darnault - UIC Civil and Materials Engineering Department;

Kathryn L. Nagy, Neil C. Sturchio, SoufianeMekki - UIC Earth and Environmental Science Department

Primary Grant Support: U.S. Department of Energy

  • Leakage has been determined in the vadose zone sediments of Hanford Site, U.S. Department of Energy Complex in Washington since 1950s, including radioactive elements such as uranium.
  • Preferential flow, a common phenomena in unsaturated soil, is the movement of water and solutes faster than the average pore water velocity due to fingering.
  • Visualization and mapping of simulated Hanford leakage water
  • Contaminant mobility is affected by sorption, colloid formation, nucleation and precipitation of secondary solids.
  • Characterize and quantify the formation of secondary precipitates in the presence of uranium with quartz and feldspar minerals.
  • Investigation of possible colloid formation
  • SEM and EDS of metaschoepite(UO3·n(H2O)(n<2) (Buck et al., 2004)
  • Three dimensional unsaturated column experiments
  • Two dimensional light transmission visualization experiments
  • Autoradiography Technique
  • Surface Analysis techniques (BET Gas Adsorption; AFM-Atomic Force Microscopy; XRD-X Ray Diffraction)
  • Insight Analysis Techniques (TRLFS-Time Resolved Laser Fluorescence Spectroscopy; EXAFS- Extended X-Ray Absorption Fine Structure)
  • Incorporation of the data to a reactive transport code
  • Understanding the fate and transport of uranium in simulated Hanford vadose zone
  • Refining the conditions needed for incorporation of radionuclides into secondary solids.
  • Predicting the effect of precipitates on vadose zone flow.
  • Modeling with colloids, nucleation, precipitation, sorption incorporated
  • Extracting general governing ideas applicable to other radioactive contaminated sites