Thesis
Laboratory column technique for the measurement of colloid transport in variably-saturated porous media
Washington State University
Master of Science (MS), Washington State University
2002
Handle:
https://hdl.handle.net/2376/79
Abstract
uniformly desaturated porous media. A coarse sand matrix which reached residual water content near 20 cm of water suction was used to verify the utility of the technique. Colloid suspensions were uniformly applied using a sprinkler with low dead volume, trivial concentration attenuation, and minimal nuisance dispersion. Unsaturated outflow suction was applied with a hanging water column through a 65 micron porous glass frit. Matric potential was measured along the column (internal diameter and length of 5 and 20 cm, respectively) at five locations. Transport breakthroughs were measured with a NaNO3 conservative tracer and two types of colloids: those removed from the matrix (native colloids) and those modified by a simulated Hanford tank-waste solution (Zhao et al., 2001). NaNO3 and colloid outflow concentrations were measured in real-time using absorbance spectroscopy. Average water content was determined from column weight and matric potential was measured using porous ceramic cups coupled with electronic strain-gage transducers. An effective saturation ( ) design error of = 0.01 was easily verified during operation.
Metrics
Details
- Title
- Laboratory column technique for the measurement of colloid transport in variably-saturated porous media
- Creators
- Kelly Dean Cherrey
- Contributors
- Markus Flury (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Crop and Soil Sciences, Department of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; Pullman, Wash. :
- Identifiers
- 99900525072901842
- Language
- English
- Resource Type
- Thesis