Experimental investigation of cesium mobility in the course of secondary mineral formations in Hanford sediment columns at 50°C

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dc.contributor.authorMashal, Kholoud Y.
dc.contributor.authorCetiner, Ziya S.
dc.date.accessioned2025-01-27T21:01:38Z
dc.date.available2025-01-27T21:01:38Z
dc.date.issued2010
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractFormation of secondary minerals and Cs mobility in Hanford sediments were investigated under conditions similar to the Hanford tank leak in a dynamic flow system at 50A degrees C. The objectives were to (1) examine the nature and locations of secondary mineral phases precipitated in the sediments and (2) quantify the amount of Cs retained by the sediment matrix at 50A degrees C. To this end, Hanford sediments were packed into 10-cm long columns and leached with simulated tank waste consisting of 1.4 M NaOH, 0.125 M NaAlO2, 3.7 M NaNO3, and 1.3 x 10 (-aEuro parts per thousand 4) M Cs at 50A degrees C. Compositions of outflow solution were monitored with time for up to 25 days, and the columns were then segmented into four 2.5-cm long layers. The colloidal fraction in these segments was characterized in terms of mineralogy, particle morphology, Cs content, and short-range Al and Si structure. It was observed that cancrinite and sodalite precipitated at 50A degrees C. Approximately 53% Cs was retained in the column treated by the simulated tank waste at this temperature. Cesium retention in the column was lowered in the high ionic strength solution due to competition from Na for the exchange sites. This can be explained by alteration of distribution and number of sorption sites which reduces the selectivity of Cs for Na, and through the formation of cancrinite and sodalite. The formation of hydroxide complexes in highly alkaline solutions could also contribute to relatively poor retention of Cs by hindering ion exchange mechanism.
dc.description.sponsorshipOffice of Science (BER), US Department of Energy [DEFG07-05ER62882]
dc.description.sponsorshipThis study was supported in part by grant DEFG07-05ER62882 from the Office of Science (BER), US Department of Energy. We thank Markus Flury and James B. Harsh for their comments on the early version of this paper. We also thank Jeff Boyle (Washington State University, WSU) for help with XRD measurements, the Electron Microscopy Center at WSU for use of their facility, and Dan Mitchell (Center for NMR Spectroscopy at WSU) for the NMR work. Preliminary findings of this study were presented at the 7th International Symposium on Environmental Geochemistry in Beijing, China.
dc.identifier.doi10.1007/s10661-009-1166-4
dc.identifier.endpage258
dc.identifier.issn0167-6369
dc.identifier.issn1573-2959
dc.identifier.issue1-4
dc.identifier.pmid19757110
dc.identifier.scopus2-s2.0-79952111546
dc.identifier.scopusqualityQ2
dc.identifier.startpage249
dc.identifier.urihttps://doi.org/10.1007/s10661-009-1166-4
dc.identifier.urihttps://hdl.handle.net/20.500.12428/27131
dc.identifier.volume169
dc.identifier.wosWOS:000281597600022
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherSpringer
dc.relation.ispartofEnvironmental Monitoring and Assessment
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectCesium mobility
dc.subjectHanford sediment columns
dc.subjectCs retention
dc.titleExperimental investigation of cesium mobility in the course of secondary mineral formations in Hanford sediment columns at 50°C
dc.typeArticle

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