浅層砂礫層における揮発性有機化合物の気液混合抽出法による土壌浄化と浄化予測

概要

論文の詳細を見る
The conventional vapor extraction technique for soil remediation is fairly effective for the clean-up of unsaturated soil. However, it is difficult to apply this technique to general contaminated sites in Japan where the groundwater level is very high. To solve this problem, the two-phase extraction technique has been developed. In this paper, this technique was applied to a contaminated site and proved fairly effect. Moreover, a prediction analysis of clean-up efficiency is carried out and prediction results are compared with the field data. The analysis model is a simple macro-scopic model, and thermodynamic equibilium states are assumed in the formulation. The two-phase extraction technique is effective in a shallow aquifer and recovery mass from vapor is 5 to 10 times larger than that from groundwater. In addition, surface gas concentrations after remediation are 90% lower than before remediation. The prediction analysis needs quite a large correction factor because this analysis assumed a homogeneous concentration distribution. However, this analysis is effective for rough estimates and is a simple to use.
社団法人　日本水環境学会の論文