Determining sorption coefficients in intact rock using an electrical potential gradient as a driving force for migration
2006 (English)In: Scientific Basis for Nuclear Waste Management XXIX / [ed] VanIseghem, P, WARRENDALE, PA: MATERIALS RESEARCH SOCIETY , 2006, Vol. 932, 975-982 p.Conference paper (Refereed)
The transport of radionuclides in indigenous rock is greatly affected by the sorption of cations in the porous rock matrix. For the determination of sorption coefficients, batch experiments have traditionally been used. For these experiments, the rock sample is crushed into fine particles to reduce the experimental time. However, this procedure increases the specific surface area of the sample and the new surfaces created could have different sorption qualities than the naturally occurring surfaces, which may impair the results of sorption coefficient determinations. A new method for determining sorption coefficients in intact rock is being developed, using electromigration as a means to speed up the transport process, thereby allowing for faster equilibration between the rock sample and the tracer solution. Here, we report results from preliminary experiments, using cesium as a sorbing tracer, showing a consistent difference between sorption coefficients obtained using electromigration methods on intact rock samples and traditional batch experiments on crushed samples.
Place, publisher, year, edition, pages
WARRENDALE, PA: MATERIALS RESEARCH SOCIETY , 2006. Vol. 932, 975-982 p.
, MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS, ISSN 0272-9172 ; 932
IdentifiersURN: urn:nbn:se:kth:diva-41953ISI: 000239003700116ScopusID: 2-s2.0-33746078839ISBN: 1-55899-889-6OAI: oai:DiVA.org:kth-41953DiVA: diva2:445786
29th International Symposium on the Scientific Basis for Nuclear Waste Management. Ghent, BELGIUM. SEP 12-16, 2005
QC 201110052011-10-052011-10-042011-10-05Bibliographically approved