Functions of clay minerals and organic matter of soils evaluated by colloidal stability and physical properties

2008 Fiscal Year Final Research Report

• Project/Area Number: 18580239
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Irrigation, drainage and rural engineering/Rural planning
• Research Institution: Ibaraki University
• Principal Investigator: KARUBE Jutaro Ibaraki University, 農学部, 教授 (10007768)
• Project Period (FY): 2006 – 2008
• Keywords: イモゴライト / ハロイサイト / 分散凝集 / 土の撥水性

Research Abstract

イモゴライトの特異な凝集の原因は、アルカリ性でイモゴライトの表面が電気的に中性になるためと考えられた。霞ヶ浦湖水の白濁現象の原因としてハロイサイトの可能性が考えられた。土壌の撥水性は、疎水性有機物や含水比、粘土添加等によって大きく変化することが判った。

Research Products

• [Journal Article] Effects of hydrophobic and hydrophilic organic matter on the water repellency of model sandy soils (2009)
  • Author(s): D.A.L. Leelamanie and J. Karube
  • Journal Title: Soil Science and Plant Nutrition (in press)
  • Peer Reviewed
• [Journal Article] Time dependence of contact angle and its relation to repellency persistence in hydrophobized sand (2009)
  • Author(s): D.A.L. Leelamanie and J. Karube
  • Journal Title: Soil Science and Plant Nutrition (in press)
  • Peer Reviewed
• [Journal Article] Relative humidity effects on contact angle and water drop penetration time of hydrophobized fine sand (2008)
  • Author(s): D.A.L. Leelamanie, J. Karube, and A. Yoshida
  • Journal Title: Soil Science and Plant Nutrition 54 Pages: 695-700
  • Peer Reviewed
• [Journal Article] Characterizing water repellency indices : Contact angle and water drop penetration time of hydrophobized sand (2008)
  • Author(s): D.A.L. Leelamanie, J. Karube, and A. Yoshida
  • Journal Title: Soil Science and Plant Nutrition 54 Pages: 179-187
  • Peer Reviewed
• [Journal Article] イモゴライトの混合がモンモリロナイトおよびカオリナイトの分散凝集特性に及ぼす影響 (2007)
  • Author(s): 馬玉露, 軽部重太郎
  • Journal Title: 土壌の物理性 107 Pages: 37-43
  • Peer Reviewed
• [Journal Article] Effects of organic compounds, water content and clay on the water repellency of a model sandy soil (2007)
  • Author(s): D.A.L. Leelamanie and J. Karube
  • Journal Title: Soil Science and Plant Nutrition 53 Pages: 711-719
  • Peer Reviewed
• [Journal Article] 霞ヶ浦湖水の白濁現象に与える底泥中のハロイサイトの影響 (2006)
  • Author(s): 軽部重太郎, 田村昭典
  • Journal Title: 農業土木学会論文 244 Pages: 81-85
  • Peer Reviewed
• [Presentation] Effects of hydrophobic and hydrophilic organic matter on water repellency of sandy soils (2008)
  • Author(s): D.A.L. Leelamanie, A. Yoshida, and J. Karube
  • Organizer: 農業農村工学会大会講演会
  • Place of Presentation: 秋田
  • Year and Date: 2008-08-27
• [Presentation] 接触角と水滴浸入時間に及ぼす粘土の影響 (2008)
  • Author(s): 吉田綾, D.A.L. Leelamanie, 軽部重太郎
  • Organizer: 農業農村工学会大会講演会
  • Place of Presentation: 秋田
  • Year and Date: 2008-08-27
• [Presentation] Effects of relative humidity on sessile drop contact angle and water drop penetration time (2007)
  • Author(s): D.A.L. Leelamanie and J. Karube
  • Organizer: 農業農村工学会大会講演会
  • Place of Presentation: 松江
  • Year and Date: 2007-08-29
• [Presentation] 砂質土における撥水性の指標について (2007)
  • Author(s): 吉田綾, D.A.L. Leelamanie, 軽部重太郎
  • Organizer: 農業農村工学会大会講演会
  • Place of Presentation: 松江
  • Year and Date: 2007-08-29
• [Presentation] Effects of organic matter, clay, and water content on water repellency of sandy soils (2006)
  • Author(s): D.A.L. Leelamanie and J. Karube
  • Organizer: 土壌物理学会ポスターセッション
  • Place of Presentation: 札幌
  • Year and Date: 2006-10-15
• [Presentation] Effects of hydrophobic organic compounds, clay, and water content on water repellency of relatively dry soils (2006)
  • Author(s): D.A.L. Leelamanie and J. Karube
  • Organizer: 農業土木学会大会講演会
  • Place of Presentation: 宇都宮
  • Year and Date: 2006-08-10
• [Presentation] 霞ヶ浦底泥の性質から見た湖水の白濁現象 (2006)
  • Author(s): 田村昭典, 軽部重太郎
  • Organizer: 農業土木学会大会講演会
  • Place of Presentation: 宇都宮
  • Year and Date: 2006-08-09
• [Presentation] イモゴライトの分散凝集と負電荷の電場の強さ (2006)
  • Author(s): 馬玉露, 軽部重太郎
  • Organizer: 農業土木学会大会講演会
  • Place of Presentation: 宇都宮
  • Year and Date: 2006-08-09
• [Book] 粘土ハンドブック(第3版) (2009)
  • Author(s): 日本粘土学会編
  • Total Pages: 786-793
  • Publisher: 技報堂出版
• [Book] 農地環境工学 (2008)
  • Author(s): 山路永司, 塩沢昌(編)
  • Total Pages: 10-17
  • Publisher: 文永堂出版