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直鎖状アニオン界面活性剤 (SDS) の黒ボク土中における移動とそれに伴う透水性変化

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Title: 直鎖状アニオン界面活性剤 (SDS) の黒ボク土中における移動とそれに伴う透水性変化
Other Titles: Linear Anionic Surfactant (SDS) Transport in High Humic Volcanic Ash Soil and its Permeability
Authors: 石黒, 宗秀1 Browse this author →KAKEN DB
鳥越, 崇宏2 Browse this author
亀岡, 喜史3 Browse this author
赤江, 剛夫4 Browse this author
Authors(alt): ISHIGURO, Munehide1
TORIGOE, Takahiro2
KAMEOKA, Yoshihumi3
AKAE, Takeo4
Keywords: アニオン界面活性剤
Anionic surfactant
High-humic soil
Solute transport
Linear carbon chain
Cooperative phenomenon
Hydraulic conductivity
Issue Date: 2008
Publisher: 農業農村工学会
Journal Title: 農業農村工学会論文集
Journal Title(alt): Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering
Volume: 2008
Issue: 258
Start Page: 7(485)
End Page: 13(491),a1
Publisher DOI: 10.11408/jsidre2007.2008.485
Abstract: 洗剤の主成分として用いられ, 多量に環境中へ放出されるアニオン界面活性剤は, 有機物で汚染された土壌の洗浄剤としても利用が検討される反面, 細胞膜を破壊する作用があるため, 環境汚染物質としても注視されている. しかし, 土壌中におけるその挙動は解明されていない. ここでは, 腐植物質を多量に含む黒ボク土中における直鎖状アニオン界面活性剤ドデシル硫酸ナトリウム (SDS) の吸着移動現象を明らかにするため, 溶質移動実験と吸着実験を行った. それらの結果は, 単純なイオンの吸着移動とは異なる特徴的な現象を示し, SDSが黒ボク土の腐植成分に協同吸着することを示唆した. 臨界ミセル濃度以下において, SDSの流出濃度曲線の濃度と透水係数の低下がほぼー致し, SDS吸着が透水性低下に影響することがわかった.
An anionic surfactant is used in detergents. It has also been tested as a cleaner for soils contaminated with hazardous organic compounds. However, surfactants contaminate aquatic environments because they can destroy cell membranes. Surfactant movements and reactions in soils are not well understood. In this study, we performed surfactant transport and adsorption experiments in soil in order to clarify these phenomena. A linear anionic surfactant, sodium dodecyl sulfate (SDS), and a highly humic volcanic ash soil were used. SDS transport and adsorption showed characteristic phenomena. with the results indicating that SDS is adsorbed cooperatively by the humic substances in the soil. These results were completely different from those for simple anions such as nitrate and chloride. Under a critical micelle concentration, the decrease in the SDS breakthrough curve coincided with the decrease in hydraulic conductivity, demonstrating that SDS adsorption generates a decrease in hydraulic conductivity.
Rights: © 社団法人 農業農村工学会
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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