دورية أكاديمية
أعرض في EDS

Assessment of 226 Ra and U colloidal transport in a mining environment.

التفاصيل البيبلوغرافية
العنوان: Assessment of 226 Ra and U colloidal transport in a mining environment.
المؤلفون: Reymond M; Institut de Chimie des Milieux et des Matériaux de Poitiers (IC2MP), UMR 7285, Université de Poitiers, CNRS, HydrASA, F-86073, Poitiers, France., Descostes M; Orano Environmental R&D Dpt, 125 avenue de Paris, 92320, Châtillon, France; Centre de Géosciences, MINES Paris, PSL University, 35 rue St Honoré, 77300, Fontainebleau, France., Besançon C; Orano Environmental R&D Dpt, 125 avenue de Paris, 92320, Châtillon, France. Electronic address: clemence.besancon@orano.group., Leermakers M; Analytical, Environmental & Geo-Chemistry (AMGC), Vrije Universiteit Brussels (VUB), Pleinlaan 2, 1050, Brussels, Belgium., Billon S; Institut de Chimie des Milieux et des Matériaux de Poitiers (IC2MP), UMR 7285, Université de Poitiers, CNRS, HydrASA, F-86073, Poitiers, France., Cherfallot G; Institut de Chimie des Milieux et des Matériaux de Poitiers (IC2MP), UMR 7285, Université de Poitiers, CNRS, HydrASA, F-86073, Poitiers, France., Muguet M; Orano Environmental R&D Dpt, 125 avenue de Paris, 92320, Châtillon, France. Electronic address: muguet.marie@aesn.fr., Beaucaire C; Consultant, 21540, Chevannay, France., Smolikova V; Analytical, Environmental & Geo-Chemistry (AMGC), Vrije Universiteit Brussels (VUB), Pleinlaan 2, 1050, Brussels, Belgium., Patrier P; Institut de Chimie des Milieux et des Matériaux de Poitiers (IC2MP), UMR 7285, Université de Poitiers, CNRS, HydrASA, F-86073, Poitiers, France.
المصدر: Chemosphere [Chemosphere] 2023 Oct; Vol. 338, pp. 139497. Date of Electronic Publication: 2023 Jul 12.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: Elsevier Science Ltd Country of Publication: England NLM ID: 0320657 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-1298 (Electronic) Linking ISSN: 00456535 NLM ISO Abbreviation: Chemosphere Subsets: MEDLINE
أسماء مطبوعة: Publication: Oxford : Elsevier Science Ltd
Original Publication: Oxford, New York, : Pergamon Press.
مواضيع طبية MeSH: Barium Sulfate* , Trace Elements*/analysis, Kaolin ; Water/analysis ; Environmental Monitoring/methods
مستخلص: The colloidal transport of trace (Fe, Al, Ba, Pb, Sr, U) and ultra-trace ( 226 Ra) elements was studied in a mining environment. An original approach combining 0.45 μm filtered water sampling, the Diffusive Gradient in Thin films (DGT) technique, mineralogical characterization, and geochemical modelling was developed and tested at 17 sampling points. DGT was used for the truly dissolved fraction of the elements of interest, while the 0.45 μm filtration includes both colloidal and truly dissolved fractions (together referred to as total dissolved fraction). Results indicated a colloidal fraction for Al (up to 50%), Ba (up to 86%), and Fe (up to 99%) explained by the presence of submicrometric grains of kaolinite, barite, and ferrihydrite, respectively. Furthermore, the total dissolved 226 Ra concentration in the water samples reached up to 10-25 Bq/L (1.2-3.0 10 -12  mol/L) at 3 sampling points, while the truly dissolved aqueous 226 Ra concentrations were in the mBq/L range. Such high total dissolved concentrations are explained by retention on colloidal barite, accounting for 95% of the total dissolved 226 Ra concentration. The distribution of 226 Ra between the truly dissolved and colloidal fractions was accurately reproduced using a (Ra x ,Ba 1-x )SO 4 solid solution, with values of the Guggenheim parameter a 0 close to ideality. 226 Ra sorption on ferrihydrite and kaolinite, other minerals well known for their retention properties, could not explain the measured colloidal fractions despite their predominance. This illustrates the key role of barite in such environments. The measured concentrations of total dissolved U were very low at all the sampling points (<4.5 10 -10  mol/L) and the colloidal fraction of U accounted for less than 65%. U sorption on ferrihydrite could account for the colloidal fraction. This original approach can be applied to other trace and ultra-trace elements to complement when necessary classical environmental surveys usually performed by filtration on 0.45 μm.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier Ltd. All rights reserved.)
فهرسة مساهمة: Keywords: (226)Ra; Barite; Colloidal transport; DGT; Ferrihydrite; U
المشرفين على المادة: 87PZU03K0K (ferric oxyhydroxide)
25BB7EKE2E (Barium Sulfate)
24H4NWX5CO (Kaolin)
0 (Trace Elements)
059QF0KO0R (Water)
تواريخ الأحداث: Date Created: 20230714 Date Completed: 20230809 Latest Revision: 20230809
رمز التحديث: 20240829
DOI: 10.1016/j.chemosphere.2023.139497
PMID: 37451635
قاعدة البيانات: MEDLINE
الوصف
تدمد:1879-1298
DOI:10.1016/j.chemosphere.2023.139497