Mineral-specific sorption of Cs, Ni, Eu and Am on granodiorite and mica gneiss

Esa Puukko, Eini Puhakka, Anatero Lindberg, Markus Olin, Martti Hakanen, Jarmo Lehikoinen

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

The contribution of the University of Helsinki (HU) and VTT, Technical Research Centre of Finland, to FUNMIG WP 1.2 focuses on the sorption of nickel and europium on selected rock types in the area of the planned repository. Mechanistic understanding of the interaction of solutes and rock forming minerals is important because fracture surface minerals may be in a very thin layer or absent in reducing bed rock conditions. The specific objective of the work is to interpret from experimental data and molecular modelling of minerals the chemical reactions governing the sorption of Ni(II) and Eu(III) as well as their sorption kinetics and reversibility using well-established thermodynamic sorption models. In this report, the selection of mineral phases for further sorption experiments is described. The work was concentrated on phyllosilicates (e.g. biotite) and tectosilicates (e.g. plagioclase) typical for the bedrock of coastal regions of the Baltic Sea. Experiments were carried out to identify the important minerals for sorption. The methods used for evaluation of the mica gneiss and granodiorite were optical microscopy for mineral contents of the samples and thin section autoradiography of Ni-63, Cs-134, Eu-152 and Am-241 to identify the minerals on which the radionuclides were mainly sorbed. Biotite was the mineral chosen for the experiments. Modelling techniques were utilised in order to obtain an insight of minerals on the molecular level. The starting point for the modelling studies was the crystallographic structures of eight minerals: biotite, chlorite, cordierite, epidote, K-feldspar, muscovite, plagioclase and sillimanite.
Original languageEnglish
Title of host publication1st Annual Workshop Proceedings of Integrated Project Fundamental Processes of Radionuclide Migration IP FUNMIG
Place of PublicationParis
Pages80-85
Publication statusPublished - 2006
MoE publication typeA4 Article in a conference publication
Event1st Annual Workshop of Integrated Project "Fundamental processes of Radionuclide Migration"(IP FUNMIG) - Paris, France
Duration: 28 Nov 20051 Dec 2005

Publication series

SeriesRapport
NumberCEA-R-6122
ISSN0429-3460

Conference

Conference1st Annual Workshop of Integrated Project "Fundamental processes of Radionuclide Migration"(IP FUNMIG)
CountryFrance
CityParis
Period28/11/051/12/05

Fingerprint

granodiorite
mica
gneiss
sorption
mineral
biotite
plagioclase
tectosilicate
rock
modeling
europium
experiment
cordierite
phyllosilicate
sillimanite
epidote
thin section
repository
muscovite
chemical reaction

Keywords

  • biotite
  • surface complexation modelling

Cite this

Puukko, E., Puhakka, E., Lindberg, A., Olin, M., Hakanen, M., & Lehikoinen, J. (2006). Mineral-specific sorption of Cs, Ni, Eu and Am on granodiorite and mica gneiss. In 1st Annual Workshop Proceedings of Integrated Project Fundamental Processes of Radionuclide Migration IP FUNMIG (pp. 80-85). Paris. Rapport, No. CEA-R-6122
Puukko, Esa ; Puhakka, Eini ; Lindberg, Anatero ; Olin, Markus ; Hakanen, Martti ; Lehikoinen, Jarmo. / Mineral-specific sorption of Cs, Ni, Eu and Am on granodiorite and mica gneiss. 1st Annual Workshop Proceedings of Integrated Project Fundamental Processes of Radionuclide Migration IP FUNMIG. Paris, 2006. pp. 80-85 (Rapport; No. CEA-R-6122).
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year = "2006",
language = "English",
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Puukko, E, Puhakka, E, Lindberg, A, Olin, M, Hakanen, M & Lehikoinen, J 2006, Mineral-specific sorption of Cs, Ni, Eu and Am on granodiorite and mica gneiss. in 1st Annual Workshop Proceedings of Integrated Project Fundamental Processes of Radionuclide Migration IP FUNMIG. Paris, Rapport, no. CEA-R-6122, pp. 80-85, 1st Annual Workshop of Integrated Project "Fundamental processes of Radionuclide Migration"(IP FUNMIG), Paris, France, 28/11/05.

Mineral-specific sorption of Cs, Ni, Eu and Am on granodiorite and mica gneiss. / Puukko, Esa; Puhakka, Eini; Lindberg, Anatero; Olin, Markus; Hakanen, Martti; Lehikoinen, Jarmo.

1st Annual Workshop Proceedings of Integrated Project Fundamental Processes of Radionuclide Migration IP FUNMIG. Paris, 2006. p. 80-85 (Rapport; No. CEA-R-6122).

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

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AU - Puukko, Esa

AU - Puhakka, Eini

AU - Lindberg, Anatero

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AU - Hakanen, Martti

AU - Lehikoinen, Jarmo

PY - 2006

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N2 - The contribution of the University of Helsinki (HU) and VTT, Technical Research Centre of Finland, to FUNMIG WP 1.2 focuses on the sorption of nickel and europium on selected rock types in the area of the planned repository. Mechanistic understanding of the interaction of solutes and rock forming minerals is important because fracture surface minerals may be in a very thin layer or absent in reducing bed rock conditions. The specific objective of the work is to interpret from experimental data and molecular modelling of minerals the chemical reactions governing the sorption of Ni(II) and Eu(III) as well as their sorption kinetics and reversibility using well-established thermodynamic sorption models. In this report, the selection of mineral phases for further sorption experiments is described. The work was concentrated on phyllosilicates (e.g. biotite) and tectosilicates (e.g. plagioclase) typical for the bedrock of coastal regions of the Baltic Sea. Experiments were carried out to identify the important minerals for sorption. The methods used for evaluation of the mica gneiss and granodiorite were optical microscopy for mineral contents of the samples and thin section autoradiography of Ni-63, Cs-134, Eu-152 and Am-241 to identify the minerals on which the radionuclides were mainly sorbed. Biotite was the mineral chosen for the experiments. Modelling techniques were utilised in order to obtain an insight of minerals on the molecular level. The starting point for the modelling studies was the crystallographic structures of eight minerals: biotite, chlorite, cordierite, epidote, K-feldspar, muscovite, plagioclase and sillimanite.

AB - The contribution of the University of Helsinki (HU) and VTT, Technical Research Centre of Finland, to FUNMIG WP 1.2 focuses on the sorption of nickel and europium on selected rock types in the area of the planned repository. Mechanistic understanding of the interaction of solutes and rock forming minerals is important because fracture surface minerals may be in a very thin layer or absent in reducing bed rock conditions. The specific objective of the work is to interpret from experimental data and molecular modelling of minerals the chemical reactions governing the sorption of Ni(II) and Eu(III) as well as their sorption kinetics and reversibility using well-established thermodynamic sorption models. In this report, the selection of mineral phases for further sorption experiments is described. The work was concentrated on phyllosilicates (e.g. biotite) and tectosilicates (e.g. plagioclase) typical for the bedrock of coastal regions of the Baltic Sea. Experiments were carried out to identify the important minerals for sorption. The methods used for evaluation of the mica gneiss and granodiorite were optical microscopy for mineral contents of the samples and thin section autoradiography of Ni-63, Cs-134, Eu-152 and Am-241 to identify the minerals on which the radionuclides were mainly sorbed. Biotite was the mineral chosen for the experiments. Modelling techniques were utilised in order to obtain an insight of minerals on the molecular level. The starting point for the modelling studies was the crystallographic structures of eight minerals: biotite, chlorite, cordierite, epidote, K-feldspar, muscovite, plagioclase and sillimanite.

KW - biotite

KW - surface complexation modelling

M3 - Conference article in proceedings

T3 - Rapport

SP - 80

EP - 85

BT - 1st Annual Workshop Proceedings of Integrated Project Fundamental Processes of Radionuclide Migration IP FUNMIG

CY - Paris

ER -

Puukko E, Puhakka E, Lindberg A, Olin M, Hakanen M, Lehikoinen J. Mineral-specific sorption of Cs, Ni, Eu and Am on granodiorite and mica gneiss. In 1st Annual Workshop Proceedings of Integrated Project Fundamental Processes of Radionuclide Migration IP FUNMIG. Paris. 2006. p. 80-85. (Rapport; No. CEA-R-6122).