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Treatment System for Soil Polluted by VCOCs Utilizing Photocatalysis

Research Project

Project/Area Number 15310047
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Environmental technology/Environmental materials
Research InstitutionThe University of Tokyo

Principal Investigator

HASHIMOTO Kazuhito  The University of Tokyo, School of Engineering, Professor, 大学院・工学系研究科, 教授 (00172859)

Co-Investigator(Kenkyū-buntansha) IRIE Hiroshi  The University of Tokyo, School of Engineering, Research Assistant, 大学院・工学系研究科, 助手 (70334349)
OHNISHI Nobuo  RCAST, Researcher, 先端科学技術研究センター, 科学技術振興特任研究員(常勤形態) (00361684)
SUNADA Kayano  Kanagawa Academy of Science and Technology, Special Research Laboratory for Optical Science, Researcher, 光科学重点研究室, 研究員 (20311433)
Project Period (FY) 2003 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥15,800,000 (Direct Cost: ¥15,800,000)
Fiscal Year 2005: ¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 2004: ¥4,600,000 (Direct Cost: ¥4,600,000)
Fiscal Year 2003: ¥8,200,000 (Direct Cost: ¥8,200,000)
KeywordsTiO_2 photocatalyst / Polluted soil / Solar light / Environmental purification / VOCs / Photocatalytic sheet / 汚染土壌現地浄化法 / 吸着剤 / VOC / 土壌汚染 / 環境改善 / 有機塩素化合物 / 吸着剤(活性炭)
Research Abstract

Volatile chlorinated organic compounds (VCOCs) such as trichloroethylene (TCE) and tetrachloroethylene (PCE) have been widely used as solvent for dry cleaning of clothes, washing of semiconductors, and so on. They have been disposed out of control, causing the soil and groundwater pollutions. These pollutions are serious environmental problems because these chemicals are carcinogenic and toxic. We have designed and proposed a treatment system for soil polluted by VCOCs utilizing "TiO_2 photocatalyst sheets". The sheet consists of TiO_2 powder and adsorbent (activated carbon). The adsorbent traps VCOCs evaporated from the soil and also traps undesirable intermediates such as phosgene and dichloroacetyl chloride (DCAC) observed by TiO_2-mediated photocatalytic degradation of TCE in gas phase.
The system utilizing the photocatalyst sheets and solar light was investigated in the actual polluted field. One field was an old factory site, and the other was an active cleaning shop. The polluted … More soil in the old factory site was mixed with "Hotsoil (CaO)" to volatilize the chemicals (PCE), and the photocatalyst sheets were covered over the soil. As the status has been kept for three weeks, the photocatalyst sheets have illuminated by solar light for the period. PCE concentrations in gas phase of the soil decreased drastically for initial two days, and they were below detectable limit after seven days. The PCE concentrations in the soil were also below 0.01 mg/L whose concentration is Japan's environmental limit of PCE. The other system to treat the polluted soil under the ground in the active cleaning shop was an aspiration treatment of VCOCs gases from the polluted soil through the well by vacuum pomp. The aspirated gases were led to an adsorption device having the photocatalytic sheets. When the sheets saturated by VCOCs gas, we hanged out the sheets under solar light and reused them in the device. The results in the actual fields show that the system using photocatalyst sheets and solar light is effective on the treatment of the soil polluted by VCOCs. Less

Report

(4 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • Research Products

    (29 results)

All 2006 2005 2004 2003 Other

All Journal Article (23 results) Book (3 results) Publications (3 results)

  • [Journal Article] 光触媒研究の歴史と基礎的考え方2006

    • Author(s)
      橋本 和仁
    • Journal Title

      現代化学 420

      Pages: 17-24

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] 光触媒を利用した環境浄化2006

    • Author(s)
      砂田香矢乃, 橋本和仁
    • Journal Title

      現代化学 420

      Pages: 63-68

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] History and Basic on Photocatalyst Research (Japanese)2006

    • Author(s)
      K.Hashimoto
    • Journal Title

      Chemistry Today 420

      Pages: 17-24

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Environmental Purfication Utilizing Photocatalysis (Japanese)2006

    • Author(s)
      K.Sunada, K.Hashimoto
    • Journal Title

      Chemistry Today 420

      Pages: 63-68

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Ti0_2 Photocatalysis : A Historical Overview and Future Prospects2005

    • Author(s)
      K.Hashimoto, H.Irie, A.Fujishima
    • Journal Title

      Japanese Journal of Applied Physics 44(12)

      Pages: 8269-8285

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] 光触媒が拓く近未来2005

    • Author(s)
      入江寛, 砂田香矢乃, 橋本和仁
    • Journal Title

      塗装工学 40

      Pages: 90-100

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] 光触媒コーティング建材の基礎と応用2005

    • Author(s)
      砂田香矢乃, 入江 寛, 橋本和仁
    • Journal Title

      電気化学 73

      Pages: 367-371

    • NAID

      10014012142

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] TiO_2 Photocatalysis : A Historical Overview and Future Prospects2005

    • Author(s)
      K.Hashimoto, H.Irie, A.Fujishima
    • Journal Title

      Japanese Journal of Applied Physics 44

      Pages: 8269-8285

    • NAID

      10016958133

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Future Prospects for Photocatalysis (Japanese)2005

    • Author(s)
      H.Irie, K.Sunada, K.Hashimoto
    • Journal Title

      Coating Technology 40

      Pages: 90-100

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Basic and Application on Building Materials Coated with TiO_2 Films (Japanese)2005

    • Author(s)
      K.Sunada, H.Irie, K.Hashimoto
    • Journal Title

      Electrochemistry 73

      Pages: 367-371

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Photocatalyst (Japanese)2005

    • Author(s)
      K.Hashimoto, B.Ohtani, A.Kudo
    • Journal Title

      NTS

      Pages: 1064-1064

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] TiO_2 Photocatalysis : A Historical Overview and Future Prospects2005

    • Author(s)
      K.Hahimoto, H.Irie, A.Fujishima
    • Journal Title

      Japanese Journal of Applied Physics 44(12)

      Pages: 8269-8285

    • NAID

      10016958133

    • Related Report
      2005 Annual Research Report
  • [Journal Article] 光触媒が拓く近未来2005

    • Author(s)
      入江寛, 砂田香矢乃, 橋本和仁
    • Journal Title

      塗装工学 40(3)

      Pages: 90-100

    • Related Report
      2005 Annual Research Report
  • [Journal Article] "Recent Development in TiO_2 Photocatalysis : Novel Applications to Interior Ecology Materials and Energy Saving Systems"2004

    • Author(s)
      H.Irie, K.Sunada, K.Hashimoto
    • Journal Title

      Electrochemistry 72

      Pages: 807-812

    • NAID

      10013631805

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] 光触媒反応機構と環境技術への応用2004

    • Author(s)
      入江寛, 砂田香矢乃, 橋本和仁
    • Journal Title

      環境管理 40(9)

      Pages: 856-863

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] 光触媒技術の基礎とその応用2004

    • Author(s)
      砂田香矢乃, 磯和俊男, 橋本和仁
    • Journal Title

      設備と管理 9(特別企画)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Recent Development in TiO_2 Photocatalysis : Novel Applications to Interior Ecology Materials and Energy Saving Systems2004

    • Author(s)
      H.Irie, K.Sunada, K.Hashimoto
    • Journal Title

      Electrochemistry 72

      Pages: 807-812

    • NAID

      10013631805

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary 2004 Annual Research Report
  • [Journal Article] Photocatalysis mechanizm and Its Application to Environmental Technology (Japanese)2004

    • Author(s)
      H.Irie, K.Sunada, K.Hashimoto
    • Journal Title

      Kankyokanri 40

      Pages: 856-863

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Basic and Application on Photocatalysis (Japanese)2004

    • Author(s)
      K.Sunada, H.Irie, K.Hashimoto
    • Journal Title

      Setsubi-to Kanri 9

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Challenge to photocatalysis under indoor light (Japanese)2004

    • Author(s)
      K.Hashimoto, H.Irie, K.Sunada
    • Journal Title

      Kogyochosakai

      Pages: 159-159

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] 環境技術開発の切り札 産学官連携2003

    • Author(s)
      橋本和仁
    • Journal Title

      Earth Guardian 1

      Pages: 114-117

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Key to Development of Environmental Technology (Japanese)2003

    • Author(s)
      K.Hashimoto
    • Journal Title

      Earth Guardian 1

      Pages: 114-117

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Illustration Book on Photocatalysis (Japanese)2003

    • Author(s)
      K.Hashimoto, A.Fujishima
    • Journal Title

      Kogyochosakai

      Pages: 308-308

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Book] 光触媒 基礎・材料開発・応用2005

    • Author(s)
      橋本和仁, 大谷文章, 工藤昭彦
    • Total Pages
      1064
    • Publisher
      (株)エヌティーエス
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Book] 室内対応型光触媒への挑戦2004

    • Author(s)
      橋本和仁, 入江寛, 砂田香矢乃
    • Total Pages
      159
    • Publisher
      工業調査会
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary 2004 Annual Research Report
  • [Book] 図解 光触媒のすべて2003

    • Author(s)
      橋本和仁, 藤嶋 昭
    • Total Pages
      308
    • Publisher
      工業調査会
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Publications] K.Sunada, T.Watanabe, K.Hashimoto: "Bactericidal Activity of Copper-Deposited TiO_2 Thin Film under Weak UV Light Illumination"Environ.Sci.Technol.. 37. 4785-4789 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] N.Sakai, A.Fujishima, T.Watanabe, K.Hashimoto: "Quantitative Evaluation of the Photoinduced Hydrophilic Conversion Proper-ties of TiO_2 Thin Film Surfaces by the Reciprocal of Contact Angle"J.Phys.Chem.B. 107. 1028-1035 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.Noguchi, A.Nakajima, T.Watanabe, K.Hashimoto: "Design of a Photocatalyst for Bromate Decomposition: Surface Modification of TiO_2 by Pseudo-boehmaite"Environ.Sci.Technol.. 37. 153-157 (2003)

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2016-04-21  

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