A modification of the electromigration device and modelling methods for diffusion and sorption studies of radionuclides in intact crystalline rocks

Show simple item record

dc.contributor.author Li, Xiaodong
dc.contributor.author Meng, Shuo
dc.contributor.author Puhakka, Eini
dc.contributor.author Ikonen, Jussi
dc.contributor.author Liu, Longcheng
dc.contributor.author Siitari-Kauppi, Marja
dc.date.accessioned 2020-05-18T08:41:02Z
dc.date.available 2020-05-18T08:41:02Z
dc.date.issued 2020-05
dc.identifier.citation Li , X , Meng , S , Puhakka , E , Ikonen , J , Liu , L & Siitari-Kauppi , M 2020 , ' A modification of the electromigration device and modelling methods for diffusion and sorption studies of radionuclides in intact crystalline rocks ' , Journal of Contaminant Hydrology , vol. 231 , 103585 . https://doi.org/10.1016/j.jconhyd.2019.103585
dc.identifier.other PURE: 137327212
dc.identifier.other PURE UUID: 9a5547c5-15ae-4a69-bb18-c45d02c91210
dc.identifier.other WOS: 000530026100003
dc.identifier.other ORCID: /0000-0002-9423-358X/work/75459754
dc.identifier.other ORCID: /0000-0002-7329-4252/work/75461871
dc.identifier.other ORCID: /0000-0001-9758-2569/work/75563362
dc.identifier.uri http://hdl.handle.net/10138/315009
dc.description.abstract To determine the diffusion and sorption properties of radionuclides in intact crystalline rocks, a new electromigration device was built and tested by running with I- and Se(IV) ions. By introducing a potentiostat to impose a constant voltage over the studied rock sample, the electromigration device can give more stable and accurate experimental results than those from the traditional electromigration devices. In addition, the variation in the pH of the background electrolytes was minimised by adding a small amount of NaHCO3 as buffers. To interpret the experimental results with more confidence, an advection-dispersion model was also developed in this study, which accounts for the most important mechanisms governing ionic transport in the electromigration experiments. Data analysis of the breakthrough curves by the advection-dispersion model, instead of the traditional ideal plug-flow model, suggest that the effective diffusivities of I- and Se(IV) are (1.15 +/- 0.06) x 10(-13) m(2)/s and (3.50 +/- 0.86) x 10(-14) m(2)/s, respectively. The results also show that I- is more mobile than Se(IV) ions when migrating through the same intact rock sample and that their sorption properties are almost identical. en
dc.format.extent 11
dc.language.iso eng
dc.relation.ispartof Journal of Contaminant Hydrology
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject Electromigration
dc.subject Advection-dispersion model
dc.subject Se(IV)
dc.subject Iodide
dc.subject Intact crystalline rock
dc.subject SOLUTE TRANSPORT
dc.subject IN-SITU
dc.subject SELENIUM
dc.subject MATRIX
dc.subject SPECIATION
dc.subject SAMPLES
dc.subject WATER
dc.subject CLAY
dc.subject 116 Chemical sciences
dc.title A modification of the electromigration device and modelling methods for diffusion and sorption studies of radionuclides in intact crystalline rocks en
dc.type Article
dc.contributor.organization Department of Chemistry
dc.contributor.organization Geological disposal of spent nuclear fuel
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1016/j.jconhyd.2019.103585
dc.relation.issn 0169-7722
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

Files in this item

Total number of downloads: Loading...

Files Size Format View
1_s2.0_S0169772219301615_main.pdf 1.313Mb PDF View/Open

This item appears in the following Collection(s)

Show simple item record