Olivia R West

Learn More
Geochemical and mineralogical changes were evaluated at a field Fe0-PRB at the Oak Ridge Y-12 site concerning operation performance during the treatment of U in high NO3- groundwater. In the 5-year study period, the Fe0 remained reactive as shown in pore-water monitoring data, where increases in pH and the removal of certain ionic species persisted.(More)
Thermogravimetric analysis (TGA) combined with X-ray diffraction (XRD) was used to identify mineral phases and determine corrosion rates of granular iron samples from a 2-yr field column study. Similar to other studies, goethite, magnetite, aragonite, and calcite were found to be the major precipitated minerals, with Fe2(OH)2CO3 and green rust as minor(More)
Rapid CO2 hydrate formation was investigated with the objective of producing a negatively buoyant CO2-seawater mixture under high-pressure and low-temperature conditions, simulating direct CO2 injection at intermediate ocean depths of 1.0-1.3 km. A coflow reactor was developed to maximize CO2 hydrate production by injecting water droplets (e.g.,(More)
This paper reports on the formation and dissolution of CO2/seawater/CO2 hydrate composite particles produced during field experiments in Monterey Bay, CA using a CO2 injector system previously developed in the laboratory. The injector consisted of a coflow reactor wherein water was introduced as a jet into liquid CO2, causing vigorous mixing of the two(More)
The most common site for rupture of the aorta as a consequence of blunt chest trauma is at the level of the isthmus. Rupture of the aortic valve with concomitant rupture of the ascending aorta is an uncommon entity and only relatively few patients sustaining such an injury survive to surgery. Early diagnosis of such injuries are critical to facilitate(More)
The operating life of an Fe(0)-based permeable reactive barrier (PRB) is limited due to chemical reactions of Fe(0) in groundwater. The relative contributions from mineral precipitation, gas production, and microbial activity to the degradation of PRB performance have been uncertain. In this controlled field study, nitrate-rich, site groundwater was treated(More)
ACKNOWLEDGEMENTS Funding for this work came through the groundwater grandchallenge project of the HPCC (High Performance Computing and Communications) program sponsored by the MICS (Mathematics, Information, and Computer Science) section of DOE/ER. The authors gratefully acknowledge the use of Intel Paragon XPS/150 supercomputer at the Center for(More)