MULTI-COMPONENT REACTIVE SOLUTE TRANSPORT ANALYSIS IN SATURATED SOIL BASED ON CIP METHOD AND CHEMICAL EQUILIBRIUM

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  • NAKAGAWA Kei
    社団法人 土木学会 鹿児島大学 農学部生物環境学科
  • WADA Shin-Ichiro
    九州大学 大学院農学研究院植物資源科学部門
  • MOMII Kazuro
    社団法人 土木学会 鹿児島大学 農学部生物環境学科

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  • CIP法と化学平衡計算による飽和土壌中の多成分溶質反応輸送解析
  • CIPホウ ト カガク ヘイコウ ケイサン ニ ヨル ホウワ ドジョウ チュウ ノ タセイブン ヨウシツ ハンノウ ユソウ カイセキ

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Abstract

A model describing one-dimensional ionic transport in saturated soils and its solution procedure are presented. The developed model is solved by coupling of transport and chemical equilibrium calculations, in which CIP scheme is used for the transport calculation. Numerical results of this model agreed well with the results of cation exchange column experiments. The proposed model was also applied to the numerical simulation of acid-flushing of a lead-contaminated soil. A series of simulations demonstrated that the model is useful to examine the effects of discharge rate and injected acid concentration on the decontamination rate. The advantages of the proposed model and the solution procedure are low computational cost and simplicity allowing for inclusion and extending the model to different chemical reactions or other reaction-based transport systems.

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