Multicomponent solute transport model with cation exchange in a redox subsurface environment

Y. Hiroshiro, K. Jinno, S. I. Wada, T. Yokoyama, M. Kubota

Research output: Contribution to journalConference articlepeer-review


In order to clarify the behaviour of chemical species under reducing condition in a subaqueous soil similar to a paddy field, a column experiment was carried out. As Mn- and Fe-(hydr)oxides were dissolved by microbially mediated reduction, Na+, K+, Mg2+, Ca2+, Mn2+, and Fe2+ existed in the pore water as major cations. The Ca2+ concentration had a tendency to decrease in the layer at 5-25 cm depth in the column, whereas the Ca2+ concentration increased with time below 45 cm depth. This phenomenon can be assumed to be due to the desorption of Ca2+, by Mn2+ and Fe2+, and its infiltration. Therefore, it is necessary to develop a solute transport model which takes into account both biochemical and cation exchange reactions. In this paper, a simulation model that considers both reactions is described and applied to simulate the results of the column experiment. The reliability of this model was evaluated by comparing the calculated results with the result of the experiment.

Original languageEnglish
Pages (from-to)474-480
Number of pages7
JournalIAHS-AISH Publication
Issue number265
Publication statusPublished - 2000
EventModelCARE'99 Conference - Zurich, Switz
Duration: Sept 20 1999Sept 23 1999

All Science Journal Classification (ASJC) codes

  • Oceanography
  • Water Science and Technology


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