Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 231-234 |
| Seitenumfang | 4 |
| Fachzeitschrift | Radiochimica acta |
| Jahrgang | 74 |
| Publikationsstatus | Veröffentlicht - 1996 |
Abstract
Recent experimental studies have shown that the replacement of interlayer cations of clay minerals by quaternary alkylammonium ions (e.g. hexadecylpyridinium, HDPY+) induce the capability to simultaneously sorb high amounts of anionic radioiodine as well as cations. In the present study, investigations were made to estimate the contribution of HDPY-Cl ion pairs to the sorption of radioiodide. Additionally, the effect of modification of the clay minerals on cation sorption was investigated. From experiments using different mixtures of ethanol/water as washing solutions, it is assumed that the ligand-exchange reaction is only one of the possible processes controlling the iodide sorption. In the lower initial concentration range of the solutions the cation (Cs+ and Sr2+) distribution coefficients of the modified clays are decreased significantly in comparision to their corresponding untreated materials. Those differences are less pronounced with higher initial concentrations. Generally, higher distribution ratios were found for the Cs+ compared to the Sr2+-ion in both untreated and treated samples. The sorption isotherms were linear in the lower concentration range of the equilibrium solution and could be described by a Freundlich equation.
ASJC Scopus Sachgebiete
- Chemie (insg.)
- Physikalische und Theoretische Chemie
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in: Radiochimica acta, Jahrgang 74, 1996, S. 231-234.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Studies on the Interaction of Radionuclides with Organophilic Clays
AU - Bors, J.
AU - Gorny, A.
AU - Dultz, St
N1 - Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 1996
Y1 - 1996
N2 - Recent experimental studies have shown that the replacement of interlayer cations of clay minerals by quaternary alkylammonium ions (e.g. hexadecylpyridinium, HDPY+) induce the capability to simultaneously sorb high amounts of anionic radioiodine as well as cations. In the present study, investigations were made to estimate the contribution of HDPY-Cl ion pairs to the sorption of radioiodide. Additionally, the effect of modification of the clay minerals on cation sorption was investigated. From experiments using different mixtures of ethanol/water as washing solutions, it is assumed that the ligand-exchange reaction is only one of the possible processes controlling the iodide sorption. In the lower initial concentration range of the solutions the cation (Cs+ and Sr2+) distribution coefficients of the modified clays are decreased significantly in comparision to their corresponding untreated materials. Those differences are less pronounced with higher initial concentrations. Generally, higher distribution ratios were found for the Cs+ compared to the Sr2+-ion in both untreated and treated samples. The sorption isotherms were linear in the lower concentration range of the equilibrium solution and could be described by a Freundlich equation.
AB - Recent experimental studies have shown that the replacement of interlayer cations of clay minerals by quaternary alkylammonium ions (e.g. hexadecylpyridinium, HDPY+) induce the capability to simultaneously sorb high amounts of anionic radioiodine as well as cations. In the present study, investigations were made to estimate the contribution of HDPY-Cl ion pairs to the sorption of radioiodide. Additionally, the effect of modification of the clay minerals on cation sorption was investigated. From experiments using different mixtures of ethanol/water as washing solutions, it is assumed that the ligand-exchange reaction is only one of the possible processes controlling the iodide sorption. In the lower initial concentration range of the solutions the cation (Cs+ and Sr2+) distribution coefficients of the modified clays are decreased significantly in comparision to their corresponding untreated materials. Those differences are less pronounced with higher initial concentrations. Generally, higher distribution ratios were found for the Cs+ compared to the Sr2+-ion in both untreated and treated samples. The sorption isotherms were linear in the lower concentration range of the equilibrium solution and could be described by a Freundlich equation.
KW - Cesium
KW - Distribution ratios
KW - Iodine
KW - Ion exchange
KW - Organo-clays
KW - Strontium
UR - http://www.scopus.com/inward/record.url?scp=0345278842&partnerID=8YFLogxK
U2 - 10.1524/ract.1996.74.special-issue.231
DO - 10.1524/ract.1996.74.special-issue.231
M3 - Article
AN - SCOPUS:0345278842
VL - 74
SP - 231
EP - 234
JO - Radiochimica acta
JF - Radiochimica acta
SN - 0033-8230
ER -