Formation of (Ba,Ra)SO4 solid solutions - Results from barite (Re)precipitation and coprecipitation experiments

Volker Metz; Yoav O. Rosenberg; Dirk Bosbach; Melanie Böttle; Jiwchar Ganor

Formation of (Ba,Ra)SO₄ solid solutions - Results from barite (Re)precipitation and coprecipitation experiments

Volker Metz, Yoav O. Rosenberg, Dirk Bosbach, Melanie Böttle, Jiwchar Ganor

Department of Earth and Environmental sciences

Research output: Contribution to conference › Paper › peer-review

Abstract

Retention of ²²⁶Ra²⁺ by barite in aqueous solution is studied in a barite (re)precipitation experiment with ²²⁶Ra ²⁺ doped barite suspensions at I = 0.1 mol·(kg H ₂O)^-1 at ambient temperature. After about two years a steady state is achieved, demonstrating that ²²⁶Ra²⁺(aq) concentration is controlled by the solubility of a (Ba,Ra)SO₄ solid solution and several orders of magnitude below the Ra²⁺ solubility with respect to a pure RaSO₄(s) endmember. Results of the barite (re)precipitation experiment are compared to recent (Ba,Ra)SO₄ coprecipitation experiments by Rosenberg and co-workers at ionic strength I = 0.7 - 7.0 mol·(kg H₂O)^-1.

Original language	English
Pages	635-642
Number of pages	8
State	Published - 1 Jan 2011
Event	6th International Conference on Uranium Mining and Hydrogeology, UMH 2011 - Freiberg, Germany Duration: 1 Sep 2011 → 1 Sep 2011

Conference

Conference	6th International Conference on Uranium Mining and Hydrogeology, UMH 2011
Country/Territory	Germany
City	Freiberg
Period	1/09/11 → 1/09/11

ASJC Scopus subject areas

Geotechnical Engineering and Engineering Geology

Cite this

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title = "Formation of (Ba,Ra)SO4 solid solutions - Results from barite (Re)precipitation and coprecipitation experiments",

abstract = "Retention of 226Ra2+ by barite in aqueous solution is studied in a barite (re)precipitation experiment with 226Ra 2+ doped barite suspensions at I = 0.1 mol·(kg H 2O)-1 at ambient temperature. After about two years a steady state is achieved, demonstrating that 226Ra2+(aq) concentration is controlled by the solubility of a (Ba,Ra)SO4 solid solution and several orders of magnitude below the Ra2+ solubility with respect to a pure RaSO4(s) endmember. Results of the barite (re)precipitation experiment are compared to recent (Ba,Ra)SO4 coprecipitation experiments by Rosenberg and co-workers at ionic strength I = 0.7 - 7.0 mol·(kg H2O)-1.",

author = "Volker Metz and Rosenberg, {Yoav O.} and Dirk Bosbach and Melanie B{\"o}ttle and Jiwchar Ganor",

year = "2011",

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pages = "635--642",

note = "6th International Conference on Uranium Mining and Hydrogeology, UMH 2011 ; Conference date: 01-09-2011 Through 01-09-2011",

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TY - CONF

T1 - Formation of (Ba,Ra)SO4 solid solutions - Results from barite (Re)precipitation and coprecipitation experiments

AU - Metz, Volker

AU - Rosenberg, Yoav O.

AU - Bosbach, Dirk

AU - Böttle, Melanie

AU - Ganor, Jiwchar

PY - 2011/1/1

Y1 - 2011/1/1

N2 - Retention of 226Ra2+ by barite in aqueous solution is studied in a barite (re)precipitation experiment with 226Ra 2+ doped barite suspensions at I = 0.1 mol·(kg H 2O)-1 at ambient temperature. After about two years a steady state is achieved, demonstrating that 226Ra2+(aq) concentration is controlled by the solubility of a (Ba,Ra)SO4 solid solution and several orders of magnitude below the Ra2+ solubility with respect to a pure RaSO4(s) endmember. Results of the barite (re)precipitation experiment are compared to recent (Ba,Ra)SO4 coprecipitation experiments by Rosenberg and co-workers at ionic strength I = 0.7 - 7.0 mol·(kg H2O)-1.

AB - Retention of 226Ra2+ by barite in aqueous solution is studied in a barite (re)precipitation experiment with 226Ra 2+ doped barite suspensions at I = 0.1 mol·(kg H 2O)-1 at ambient temperature. After about two years a steady state is achieved, demonstrating that 226Ra2+(aq) concentration is controlled by the solubility of a (Ba,Ra)SO4 solid solution and several orders of magnitude below the Ra2+ solubility with respect to a pure RaSO4(s) endmember. Results of the barite (re)precipitation experiment are compared to recent (Ba,Ra)SO4 coprecipitation experiments by Rosenberg and co-workers at ionic strength I = 0.7 - 7.0 mol·(kg H2O)-1.

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M3 - Paper

AN - SCOPUS:84896668947

SP - 635

EP - 642

T2 - 6th International Conference on Uranium Mining and Hydrogeology, UMH 2011

Y2 - 1 September 2011 through 1 September 2011

ER -

Formation of (Ba,Ra)SO₄ solid solutions - Results from barite (Re)precipitation and coprecipitation experiments

Abstract

Conference

ASJC Scopus subject areas

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