Analysis for Gas Behaviors of the Groundwater Pollutant (Volatile Chlorinated Organic Compound) in Unsaturated Zone-for the Design of the Remediation Method by the Vacuum Extraction Technique-

非饱和带地下水污染物（挥发性氯化有机物）气体行为分析-真空抽提技术修复方法设计-

• 批准号: 04555127
• 负责人: MURAOKA Kohji
• 金额: $ 4.54万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04555127/
• 关键词: unsaturated zone; trichloroethylene; volatility; chlorinated organic compounds; vacuum extraction method; monitoring; existing form of contaminant; suface soil-gas exploration; ガス吸き浄化法; 現地調査; 汚染実態; 土壌ガス; 不飽和帯; 揮発性; 多孔体; 地下水汚染

1.Characteristic of gaseous polluted material in porous medium : (1) In case of 1D column experiment, the characteristic of the vertical movement is depend on the diffusion in the porous medium. It is explained by using the diffusion coefficient in the air multiplied by the coefficient related to the porosity. (2) In case of 2D tank experiment, the expansion of the trichloroethylene gas in unsaturated zone is explained. The behavior in case of the solution is similar to one in case of the undiluted solution. And the proportional relation between concentration of the solution and one of the gas is made certain. (3) The 2D behavior of the volatile gas, when the vacuum extraction is carried out, is made clear. It depends on the value of the vacuum, and also on the surface boundary condition.2.Research of contaminated area : (1) The surface soil-gas survey in polluted area is effective for a soil and groundwater research in a shallow zone. (2) The remedial operation in the contaminated site is carried out. The removed rate of the pollutant at the initial stage of the operation is high. According to progress of the operation, its rate is decreased and the recovery rate by groundwater extraction is over the one by soil-gas extraction. (3) It is important to select the suitable remediational technique, according to the existing form of contaminant and to the progress of the recovery. The suitable standard to finish the operation and the method to evaluate the effect of the remedial operation are required.

1.气态污染物在多孔介质中的运动特性：（1）在一维柱实验中，污染物在多孔介质中的垂直运动特性主要取决于扩散。它是通过使用在空气中的扩散系数乘以与孔隙率有关的系数来解释的。(2)在二维水槽实验的情况下，对三氯乙烯气体在非饱和区的膨胀进行了解释。溶液的行为与未稀释溶液的行为相似。确定了溶液浓度与气体浓度之间的比例关系。(3)当进行真空提取时，挥发性气体的2D行为是清楚的。2.污染区研究：（1）污染区的地表土-气测量是浅层土壤和地下水研究的有效手段。(2)在受污染场地进行补救作业。运行初期污染物去除率高。随着开采的进行，地下水开采的速度逐渐降低，地下水开采的采收率高于土-气开采。(3)根据污染物的存在形式和恢复的进度，选择合适的修复技术是非常重要的。这就要求有一个合适的标准来完成手术，并有一种方法来评估手术的效果。

项目成果

石井義裕: "二次元不飽和多孔体におけるガス吸引時の有機塩素ガスの挙動に関する実験的研究" 第3回地下水・土壌汚染とその防止対策に関する研究集会 講演集. 245-250 (1994)

石井义博：“二维不饱和多孔材料吸气过程中有机氯气体行为的实验研究”第三届地下水和土壤污染及其防治措施研究会议论文集245-250（1994）。

T.HIRATA: "Remedial operation for subsurface pollution due to volatile organochlorine using soil ventilation and groundwater extraction" Contaminated Soil '93, Kluwer Academic Publishers. 1019-1028 (1993)

T.HIRATA：“利用土壤通风和地下水提取对挥发性有机氯造成的地下污染进行补救操作”污染土壤 93，Kluwer 学术出版社。

村岡 浩爾: "不飽和多孔体における揮発性物質の挙動について" 地下水汚染とその防止対策に関する研究集合第2回講演集. 38-41 (1992)

Koji Muraoka：“关于不饱和多孔材料中挥发性物质的行为”第二届地下水污染与预防措施研究组论文集38-41（1992）。

T. HIRATA: "Remedial operation for subsurface pollution due to volatile organochlorine using soil ventilation and ground water extraction" Contaminated Soil '93. 1019-1028 (1993)

T. HIRATA：“利用土壤通风和地下水提取对挥发性有机氯造成的地下污染进行补救操作”污染土壤93。

T.NAGATO: "Soil Remediation by Two Phase Extraction and Prediction of Soil Cleanup" Journal of Japan Society on Water Environment. Vol.17, No.10. 641-649 (1994)

T.NAGATO：“两相提取的土壤修复和土壤清理的预测”日本水环境学会杂志。