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The effects of principal constituents of acid rain on volcanic ash soil.

Research Project

Project/Area Number 13660236
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Irrigation, drainage and rural engineering/Rural planning
Research InstitutionUtsunomiya University

Principal Investigator

MATSUKAWA Susumu  Utsunomiya Univ., Faculty of Agriculture, Professor, 農学部, 教授 (70008069)

Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2002: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2001: ¥2,500,000 (Direct Cost: ¥2,500,000)
Keywordsacid deposition / volcanic ash soil / acid buffering capacity / chemical equilibrium / mixing cell model / anion composition / 硫酸、硝酸イオン / 酸性化予測
Research Abstract

The prediction method of ion concentration in soil solutions with repetitive addition of acid solutions that vary in equivalent ratios of nitrate to sulfate in volcanic ash soil was examined in this study. The method for prediction was composed of chemical equilibrium equation, electrical balance and conservation of mass in soil solutions. The results were summarized in the following.
1) There was a tendency of HNO_3 solution > acid mixed solution including NO_3^- and SO_4^2^->H_2SO_4 solution on the quantity of dissolved aluminum with equal soil solution pH.
2) The model could not simulate well concentration change of basic cations. However, it adequately described cumulative release of basic cations. This shows it is ability to estimate acid buffering capacity of cation exchange and mineral weathering.
3) The model less estimated concentration of SO_4^2^- further than the measured value with addition of acid mixed solution, NO_3^- : SO_4^2^- is 0.75 : 0.25. However, it adequately described pH decreasing process and concentration change of basic cations. Therefore, it seemed that NO_3^-, which is difficult to be adsorbed in soil, is dominantly affected release of basic cations and pH decreasing in soil when acid rain including NO_3^- and SO_4^2^- deposited to volcanic ash soil.
4) The simulation results agreed well with the measured values of pH and cumulative release of basic cations. These represent the most serious effects of the acid deposition on the soil. Therefore, parameters used in this simulation model are useful for predicting the main effects of the acid deposition on the Kanto loam subsoil.

Report

(3 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • Research Products

    (7 results)

All Other

All Publications (7 results)

  • [Publications] 亀山, 松川, 加藤, 石田: "火山灰土壌への硫酸溶液浸透による溶脱液濃度予測"土壌の物理性. 89号. 25-33 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 亀山, 松川, 石田, 加藤: "陰イオン組成の異なる酸性溶液を火山灰土壌へ添加した場合の土壌溶液濃度予測"土壌の物理性. (閲読終了、印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Kameyama Kouji, Matsukawa Susumu: "Ion Concentaion Prediction of the Effluent during the Sulfuric Acid solution Permeation into Volcanic Ash soil"J. Jpn Soc. Soil Phys. 89. 25-33 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Kameyama Kouji, Matsukawa Susumu: "Prediction of Soil Solution Composition of Volcanic Ash Soil upon Addition of Acid Solution with Varing Anion Composition"J. Jpn Soc. Soil Phys. in press. (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 亀山, 松川, 加藤, 石田: "火山灰土壌への硫酸溶液浸透による溶脱液濃度予測"土壌の物理性. 89号. 25-33 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 亀山, 松川, 石田, 加藤: "陰イオン組成の異なる酸性溶液を火山灰土壌へ添加した場合の土壌溶液濃度予測"土壌の物理性. (閲読終了、印刷中). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] 松川 進, 亀山幸司, 石田朋靖, 加藤秀正: "火山灰土壌への硫酸溶液浸透による溶脱液濃度予測"土壌物理学会誌. 89号. 23-31 (2002)

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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