Speciation of iodine (127I and 129I) in lake sediments
2010 (English)In: Nuclear Instruments and Methods in Physics Reseach B, ISSN 0168-583X, Vol. 268, no 7-8, 1102-1105 p.Article in journal (Refereed) Published
Fallout of anthropogenic I-129 at northern Europe has been occurring since the early 1950. Nevertheless, it is still unclear where and how this radioactive iodine is incorporated in the surface environment. In order to elucidate part of this problem, we here present an investigation of the occurrence modes of I-129 in varved lake sediments, collected in central Sweden and cover the period 1941-2007. Using a sequential extraction method, the results of I-129 and I-127 indicate that the partitioning of the two isotopes were more or less similar, despite the large gradient of I-129 within the sediment. Organic bound iodine was the dominant form over other fractions, while iodine bound to metal oxides was negligible. The leachable part constituted 5-6% of the iodine. Diagenetic influence seems to exert a limited effect on distribution of iodine in the examined sediment section.
Place, publisher, year, edition, pages
2010. Vol. 268, no 7-8, 1102-1105 p.
Iodine-129, Speciation, Sediment, Nuclear reprocessing, Sellafield, La Hague
Earth and Related Environmental Sciences
IdentifiersURN: urn:nbn:se:uu:diva-136901DOI: 10.1016/j.nimb.2009.10.109ISI: 000277462300104OAI: oai:DiVA.org:uu-136901DiVA: diva2:377596