Interim Report - Hanford Site

3.3.4 Column Transport Experiments............................................................................... 3.25
3.4 Apatite Barrier Longevity .................................................................................................. 3.26
3.4.1 Hydroxyapatite Single-Pass Flow-Through Dissolution Experiments .................... 3.26
3.4.2 Column Experiments ............................................................................................... 3.32
3.5 Effect of pH and Temperature on the Dissolution Kinetics of Meta-
Autunite Minerals............................................................................................................... 3.33
3.5.1 Interlayer Cation Release Rates............................................................................... 3.37
3.5.2 Structural Dissolution .............................................................................................. 3.37
3.6 Polyphosphate Amendment................................................................................................ 3.39
4.0 Conclusions................................................................................................................................ 4.1
5.0 References.................................................................................................................................. 5.1
Appendix............................................................................................................................................ A.1
Figures
1 Map of the Hanford Site.......................................................................................................... 1.2
2 300 Area Detail Map Showing Uranium Plume in December 2005 and Test
Site Location............................................................................................................................ 1.4
3 300 Area Detail Map Showing Uranium Plume in June 2006 ................................................ 1.5
4 Schematic Depicting the 300-FF-5 Operable Unit Geology and Proposed Treatability
Test of Polyphosphate to Sequester Uranium.......................................................................... 1.6
5 Schematic Depicting the Step-Wise Hydrolysis of Sodium Tripolyphosphate....................... 1.7
6 Hydrolysis Rate of Polyphosphate Molecules as a Function of pH ........................................ 1.7
7 Photo Displaying the Apatite Barrier Placed in the Middle of a Sediment Column
Composed of the