Impact of pore fluid composition changes on soil filter clogging
- Kansas State Univ., Manhattan, KS (United States)
Current design criteria for soil filters in geotechnical engineering are based on mechanical principles of straining alone without any physico-chemical considerations. Transport and deposition of colloid-size particles in the subsurface are influenced by pore fluid composition. It is essential to design filters in contaminated environment, such as those for leachate collection systems, with due considerations of the pore fluid composition. In this paper, the impact of changes in pore fluid composition on sod filter clogging is assessed with the help of a mathematical model. The role of pore fluid composition in soil filter clogging is studied by evaluating its effect on the erodibility of base soils, size of the migrating particles, and on the likelihood of particle deposition. The results suggest that pore fluid composition influences the deposition to the extent it can cause significant changes in pore clogging. In the cases where particles are generated from base soils, filter clogging increased at low salt concentrations but was limited by reduced erodibilities at high salt concentrations.
- OSTI ID:
- 567827
- Report Number(s):
- CONF-971032--
- Country of Publication:
- United States
- Language:
- English
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