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1994 Fiscal Year Final Research Report Summary

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-

Research Project

Project/Area Number 04555127
Research Category

Grant-in-Aid for Developmental Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Hydraulic engineering
Research InstitutionOsaka University

Principal Investigator

MURAOKA Kohji  Osaka Univ., Faculty of Engineering, Professor, 工学部, 教授 (90029017)

Co-Investigator(Kenkyū-buntansha) HIRATA Tatemasa  The National Institute for Environmental Studies, Regional Environmental Divisio, 地域環境研究グループ, 主任研究員 (30093454)
TAMAI Masahiro  Osaka Univ., Faculty of Engineering, Research Associate, 工学部, 助手 (70197557)
ISHII Yoshihiro  Osaka Univ., Faculty of Engineering, Research Associate, 工学部, 助手 (30243166)
Project Period (FY) 1992 – 1994
Keywordsunsaturated zone / trichloroethylene / volatility / chlorinated organic compounds / vacuum extraction method / monitoring / existing form of contaminant / suface soil-gas exploration
Research Abstract

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.

  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] 長藤哲夫: "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" 水環境学会誌. 17-10. 641-650 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 村岡浩爾: "土壌汚染に対する行政の対応" 地下水技術. 36-3. 33-38 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T. HIRATA: "Surface soil gas survey for identifying pollutant source and existing form of organochlorines in subsurface environment" IAH Selected Papers. 4. 39-49 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T. HIRATA: "Remedial operation for subsurface pollution due to volatile organochlorine using soil ventilation and ground water extraction" Contaminated Soil '93. 1019-1028 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 村岡浩爾: "有機塩素化合物地下水汚染改善に関する基礎研究" 地下水技術. 35-1. 26-34 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 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)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 平田健正: "土壌・地下水汚染調査における表層土壌ガス調査の役割" 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. 87-92 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 村岡浩爾ほか: "地下水汚染・土壌汚染の現状と浄化対策" 研修社・工業技術会, 409 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 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)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.MURAOKA: "Political Management for Groundwater and Soil Pollutant" Journal of Ground Water Technology. Vol.36, No.3. 33-38 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.MURAOKA: "Basic studies for the improvement of the groundwater contamination by chlorinated organic compounds" Journal of Ground Water Technology. Vol.35, No.1. 26-34 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.HIRATA: "The Role of the Surface Soil-Gas Exploration in the Soil and Groundwater contamination survey" Proc. of the 3rd Symposium on Groundwater/Soil Pollutions and Their Management. 87-92 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.ISHII: "Experimental Studies for Behaviors of Gaseous Chlorinated Organic Compounds by Vacuum Extraction Method in 2D Unsaturated Porous Medium" Proc. of the 3rd Symposium on Groundwater/Soil Pollutions and Their Management. 245-250 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.HIRATA: "Surface soil gas survey for identifying pollutant source and existing form of organochlorines in subsurface environment" IAH Selected Paper. 4. 39-49 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] 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)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.MURAOKA: "Chapter3 : Dissolution of Organic Chlorinated Compounds in Soil due to Infiltration of rainwater" Ed. Soc. of Industrial technology, "State and Measures of Pollution of Soil and Groundwater", Co. Kenshusha. 33-44 (1993)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1996-04-15  

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