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Modeling of Salt Sorption in Volcanic Ash Soil

Nakagawa, Kei; Wada, Shin Ichiro; Kitamura, Ryoma and Berndtsson, Ronny LU (2017) In Communications in Soil Science and Plant Analysis 48(21). p.2594-2600
Abstract

Groundwater pollution by nitrate from agricultural fields is a worldwide problem. To improve the understanding of nitrate transport processes through volcanic ash soils overlying groundwater aquifers, salt sorption experiments were performed. Salt sorption is the process that involves the simultaneous use of cation and anion adsorption mechanisms without changing the pH. Prepared six different concentrations of potassium chloride (KCl) solutions were mixed with soil samples. Anion and cation contents of the liquid and solid phases were determined. Experiments were performed in triplicate of six kinds of KCl solutions for three types of soils. Thus, total 54 of samples were analyzed. Relationships between ionic strength and sorption... (More)

Groundwater pollution by nitrate from agricultural fields is a worldwide problem. To improve the understanding of nitrate transport processes through volcanic ash soils overlying groundwater aquifers, salt sorption experiments were performed. Salt sorption is the process that involves the simultaneous use of cation and anion adsorption mechanisms without changing the pH. Prepared six different concentrations of potassium chloride (KCl) solutions were mixed with soil samples. Anion and cation contents of the liquid and solid phases were determined. Experiments were performed in triplicate of six kinds of KCl solutions for three types of soils. Thus, total 54 of samples were analyzed. Relationships between ionic strength and sorption capacity increments of cations and anions were determined. The results show that if ionic strength of the infiltrating solution to the volcanic ash soil is known, the ECEC (effective cation exchange capacity) and EAEC (effective anion exchange capacity) can be reliably estimated. The resulting prediction equations can be included to improve reactive transport simulation models. Consequently, it will be possible to better understand solute transport with changing sorption capacity for the solid soil phase.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Andisol, anion exchange, cation exchange, electrical conductivity, ionic strength, salt sorption
in
Communications in Soil Science and Plant Analysis
volume
48
issue
21
pages
7 pages
publisher
Taylor & Francis
external identifiers
  • scopus:85038096091
ISSN
0010-3624
DOI
10.1080/00103624.2017.1416139
language
English
LU publication?
yes
id
a79e9576-82f7-4b1a-9cd2-b814e228c901
date added to LUP
2018-01-03 10:55:51
date last changed
2018-04-13 14:42:54
@article{a79e9576-82f7-4b1a-9cd2-b814e228c901,
  abstract     = {<p>Groundwater pollution by nitrate from agricultural fields is a worldwide problem. To improve the understanding of nitrate transport processes through volcanic ash soils overlying groundwater aquifers, salt sorption experiments were performed. Salt sorption is the process that involves the simultaneous use of cation and anion adsorption mechanisms without changing the pH. Prepared six different concentrations of potassium chloride (KCl) solutions were mixed with soil samples. Anion and cation contents of the liquid and solid phases were determined. Experiments were performed in triplicate of six kinds of KCl solutions for three types of soils. Thus, total 54 of samples were analyzed. Relationships between ionic strength and sorption capacity increments of cations and anions were determined. The results show that if ionic strength of the infiltrating solution to the volcanic ash soil is known, the ECEC (effective cation exchange capacity) and EAEC (effective anion exchange capacity) can be reliably estimated. The resulting prediction equations can be included to improve reactive transport simulation models. Consequently, it will be possible to better understand solute transport with changing sorption capacity for the solid soil phase.</p>},
  author       = {Nakagawa, Kei and Wada, Shin Ichiro and Kitamura, Ryoma and Berndtsson, Ronny},
  issn         = {0010-3624},
  keyword      = {Andisol,anion exchange,cation exchange,electrical conductivity,ionic strength,salt sorption},
  language     = {eng},
  month        = {11},
  number       = {21},
  pages        = {2594--2600},
  publisher    = {Taylor & Francis},
  series       = {Communications in Soil Science and Plant Analysis},
  title        = {Modeling of Salt Sorption in Volcanic Ash Soil},
  url          = {http://dx.doi.org/10.1080/00103624.2017.1416139},
  volume       = {48},
  year         = {2017},
}