Modeling Solute Transport in Volcanic Ash Soils with Cation Exchange and Anion Retardation
Nakagawa, Kei ; Momii, Kazuro and Berndtsson, Ronny LU
(2011)
In Environmental Modeling and Assessment
16(4).
p.335-342
- Abstract
- Groundwater under agricultural lands is often contaminated by nitrate. In southern Japan, aquifers are covered by volcanic ash soils that can leach nitrate to the groundwater. In this study, column experiments using two volcanic ash soils (Kuroboku and Akahoya) were carried out. A mixed solution of KNO3 and K2SO4 was used in the leaching experiments. Based on the experiments, a reactive transport model was developed using the Constrained Interpolation Profile method for ion transport and used to calculate chemical equilibrium for the cation exchange reactions. Anion adsorption was modeled by retardation in the numerical model. The developed simulation model results were compared to results obtained by the reactive transport model PHAST.... (More)
- Groundwater under agricultural lands is often contaminated by nitrate. In southern Japan, aquifers are covered by volcanic ash soils that can leach nitrate to the groundwater. In this study, column experiments using two volcanic ash soils (Kuroboku and Akahoya) were carried out. A mixed solution of KNO3 and K2SO4 was used in the leaching experiments. Based on the experiments, a reactive transport model was developed using the Constrained Interpolation Profile method for ion transport and used to calculate chemical equilibrium for the cation exchange reactions. Anion adsorption was modeled by retardation in the numerical model. The developed simulation model results were compared to results obtained by the reactive transport model PHAST. The developed model was shown to quite well reproduce general characteristics of the experimental results. Also, the developed model results agreed well with results from PHAST. Slight discrepancy between observed and calculated breakthrough curves was probably caused by ignoring the kinetic reaction in the model calculations. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2072344
- author
- Nakagawa, Kei
; Momii, Kazuro
and Berndtsson, Ronny
LU
- organization
- publishing date
- 2011
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Volcanic ash soils, Nitrate, Cation exchange, Anion adsorption, Reactive transport
- in
- Environmental Modeling and Assessment
- volume
- 16
- issue
- 4
- pages
- 335 - 342
- publisher
- Springer
- external identifiers
-
- wos:000293243800002
- scopus:79960843608
- ISSN
- 1573-2967
- DOI
- 10.1007/s10666-011-9262-6
- language
- English
- LU publication?
- yes
- id
- 63a3d257-a29e-41bf-b1fa-59c0320a1c73 (old id 2072344)
- date added to LUP
- 2016-04-01 10:18:23
- date last changed
- 2023-09-13 23:34:40
@article{63a3d257-a29e-41bf-b1fa-59c0320a1c73,
abstract = {{Groundwater under agricultural lands is often contaminated by nitrate. In southern Japan, aquifers are covered by volcanic ash soils that can leach nitrate to the groundwater. In this study, column experiments using two volcanic ash soils (Kuroboku and Akahoya) were carried out. A mixed solution of KNO3 and K2SO4 was used in the leaching experiments. Based on the experiments, a reactive transport model was developed using the Constrained Interpolation Profile method for ion transport and used to calculate chemical equilibrium for the cation exchange reactions. Anion adsorption was modeled by retardation in the numerical model. The developed simulation model results were compared to results obtained by the reactive transport model PHAST. The developed model was shown to quite well reproduce general characteristics of the experimental results. Also, the developed model results agreed well with results from PHAST. Slight discrepancy between observed and calculated breakthrough curves was probably caused by ignoring the kinetic reaction in the model calculations.}},
author = {{Nakagawa, Kei and Momii, Kazuro and Berndtsson, Ronny}},
issn = {{1573-2967}},
keywords = {{Volcanic ash soils; Nitrate; Cation exchange; Anion adsorption; Reactive transport}},
language = {{eng}},
number = {{4}},
pages = {{335--342}},
publisher = {{Springer}},
series = {{Environmental Modeling and Assessment}},
title = {{Modeling Solute Transport in Volcanic Ash Soils with Cation Exchange and Anion Retardation}},
url = {{http://dx.doi.org/10.1007/s10666-011-9262-6}},
doi = {{10.1007/s10666-011-9262-6}},
volume = {{16}},
year = {{2011}},
}