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Title: 土・多孔質体中の毛管上昇浸潤に及ぼすアニオン界面活性剤溶液濃度の影響
Other Titles: Capillary Rise Infiltration into Soils and Porous Media as Affected by an Anionic Surfactant Concentration
Authors: 石黒, 宗秀1 Browse this author →KAKEN DB
藤井, 知和2 Browse this author
赤江, 剛夫3 Browse this author
Authors(alt): ISHIGURO, Munehide1
FUJII, Tomokazu2
AKAE, Takeo3
Keywords: 毛管上昇
Capillary rise
Contact angle
Surface tension
Saturated hydraulic conductivity
Issue Date: Apr-2005
Publisher: 農業農村工学会
Journal Title: 農業土木学会論文集
Journal Title(alt): Transactions of The Japanese Society of Irrigation, Drainage and Reclamation Engineering
Volume: 236
Start Page: 53(131)
End Page: 59(137)
Publisher DOI: 10.11408/jsidre1965.2005.131
Abstract: 界面活性剤は, 洗剤・シャンプー・肥料や農薬の添加剤として利用され, 多量に環境中へ放出されている.そのため, 土壌環境中への影響も懸念される.ここでは, アニオン界面活性剤溶液濃度の相違が土壌への水浸潤に及ぼす影響を明らかにするため, 種々濃度のドデシル硫酸ナトリウム溶液 (SDS) を乾燥試料カラムに毛管浸潤させ, その浸潤前線の変化を測定した.毛管上昇式を提案し, 計算毛管上昇曲線を用いてSDS溶液の影響を明確にした.親水性無機試料のガラスビーズ, 砂では, SDS濃度増加に伴い, 溶液の表面張力低下のため浸潤が遅くなった.疎水性有機試料のポリエチレン粒子, ピートでは, SDS濃度増加に伴い, 主に前進接触角減少のため浸潤が速くなった.腐葉土では, SDS濃度増加に伴い浸潤が遅くなった.これは, 高濃度になると膨潤性が増し, 透水性が低下したためと推測された.
Surfactants are used in detergents, shampoos, chemical fertilizers, agricultural chemicals etc., and much amount has been discharged to the environment. Their adverse effects on the soil environment are suspected. In this study, sodium dodecyl sulfate (SDS) solutions of different concentrations were infiltrated with capillary rise into dry material columns in order to investigate the influence of the anionic surfactant concentration on water infiltration. The capillary rise equation was proposed and the influence of SDS was explained by using this equation. For hydrophilic inorganic materials, glass beads and sand, infiltration rate decreased as the SDS concentration increased due to the decrease of the surface tension of the solution. For hydrophobic organic materials, polyethylene particles and peat, infiltration rate increased with the SDS concentration mainly because of the decrease of the contact angle. For leaf mold, infiltration rate decreased as the SDS concentration increased probably due to the development of swelling.
Rights: © 社団法人 農業農村工学会
© The Japanese Society of Irrigation, Drainage and Rural Engineering
Type: article
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 石黒 宗秀

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