Natural Gradient Tracer Test for a Permeable Reactive Barrier in Denmark. I: Field Study of Tracer Movement
| Autor: | Irene M.C. Lo, Peter Kjeldsen, Keith C. K. Lai |
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| Rok vydání: | 2006 |
| Předmět: | |
| Zdroj: | Practice Periodical of Hazardous, Toxic, and Radioactive Waste Management. 10:231-244 |
| ISSN: | 1944-8376 1090-025X |
| DOI: | 10.1061/(asce)1090-025x(2006)10:4(231) |
| Popis: | A funnel-and-gate permeable reactive barrier (PRB) packed with zero-valent iron ( Fe0 ) was installed in 1999 at the Vapokon site in Denmark for groundwater remediation. To understand the behavior of groundwater flow through the PRB, a natural gradient tracer experiment was conducted from November 1, 2002 to August 8, 2003 to provide detailed information describing the transport of a nonreactive tracer (lithium ion, Li+ ) across the PRB. The movement of the Li+ plume monitored from a dense network of multilevel samplers indicated that the contaminated groundwater did pass through the PRB rather than bypassing it. However, a noticeable lateral change of the flow path and downward movement of the Li+ plume was observed in the immediate vicinity of the front edge of the Fe0 reactive medium, probably due to the sectional clogging of the Fe0 reactive medium caused by mineral precipitates. Afterward, the Li+ plume flowed preferentially along the PRB. Besides, gravel packs installed just upgradient and downgradi... |
| Databáze: | OpenAIRE |
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