碩士 / 國立成功大學 / 資源工程學系碩博士班 / 90 / Air Sparging is an innovative remediation technique that utlize volatization and degradation to remediate petroleum spills problems. This paper mainly uses T2VOC code to simulate Air Sparging and Soil Vapor Extraction(AS/SVE) technique for the removal of NAPLs Contamination and discuss its results. The reason of using numerical simulation is the mechanism of Air Sparging can’t be well-predicted by closed-form equations.
In the process of simulations, the results show when the saturated hydraulic conductivity of the aquifer is too small, such as clay layers, this air sparging technique would be hardly executed. In the sensitivity analytical process of homogeneous aquifers, the bigger hydraulic conductivity and smaller porosity could get more faster removal efficiency. However,in the heterogeneous aquifers, the airfolw can’t get through the clay layer directly. No matter what the air injection screen was set above or below the clay ,there is about 28% of TCE that could be taken away after one year cleaned.
Finally, we apply this model to a real remedial case at LLNL Site300.In such case, during 5 years of remedial duration, the simulating results are similar to those from monitoring data except the period of 1 to 2.5years. This indicates that this model is suitable to be a reference of predicting the remediation efficiency .
| Identifer | oai:union.ndltd.org:TW/090NCKU5397024 |
| Date | January 2002 |
| Creators | Po-Ying Yen, 顏伯穎 |
| Contributors | Cheng-Haw Lee, 李振誥 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 84 |
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