We utilize synchrotron X-ray computed microtomography to capture and quantify snapshots in time of dissolution and secondary precipitation in the microstructure of Hanford sediments exposed to simulated caustic waste in flow-column experiments. The experiment is complicated somewhat as logis- tics dictated that the column spent significant amounts of time in a sealed state (acting as a batch reactor). Changes accompanying a net reduction in porosity of 4% were quantified including: 1) a 25% net decrease in pores resulting from a 38% loss in the number of pores less than
Revised: June 23, 2010 |
Published: September 23, 2009
Citation
Cai R., W. Lindquist, W. Um, and K.W. Jones. 2009.Tomographic Analysis of Reactive Flow Induced Pore Structure Changes in Column Experiments.Advances in Water Resources 9, no. 32:1396-1403.PNNL-SA-67057.doi:10.1016/j.advwatres.2009.06.006