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Effects of cellulose degradation products on the mobility of Eu(III) in repositories for low and intermediate level radioactive waste
KTH, School of Chemical Science and Engineering (CHE), Chemistry.
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology.
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Applied Physical Chemistry.
2017 (English)In: Journal of Hazardous Materials, ISSN 0304-3894, E-ISSN 1873-3336, Vol. 340, 384-389 p.Article in journal (Refereed) Published
Abstract [en]

The deep repository for low and intermediate level radioactive waste SFR in Sweden will contain large amounts of cellulosic waste materials contaminated with radionuclides. Over time the repository will be filled with water and alkaline conditions will prevail. In the present study degradation of cellulosic materials and the ability of cellulosic degradation products to solubilize and thereby mobilise Eu(III) under repository conditions has been investigated. Further, the possible immobilization of Eu(III) by sorption onto cement in the presence of degradation products has been investigated. The cellulosic material has been degraded under anaerobic and aerobic conditions in alkaline media (pH: 12.5) at ambient temperature. The degradation was followed by measuring the total organic carbon (TOC) content in the aqueous phase as a function of time. After 173 days of degradation the TOC content is highest in the anaerobic artificial cement pore water (1547 mg/L). The degradation products are capable of solubilising Eu(III) and the total europium concentration in the aqueous phase was 900 μmol/L after 498 h contact time under anaerobic conditions. Further it is shown that Eu(III) is adsorbed to the hydrated cement to a low extent (<9 μmol Eu/g of cement) in the presence of degradation products.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 340, 384-389 p.
Keyword [en]
Cellulose degradation, Cement, Eu(III), Sorption
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-212212DOI: 10.1016/j.jhazmat.2017.07.008Scopus ID: 2-s2.0-85025067373OAI: oai:DiVA.org:kth-212212DiVA: diva2:1134688
Note

QC 20170821

Available from: 2017-08-21 Created: 2017-08-21 Last updated: 2017-08-21Bibliographically approved

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