Speciation of I-129 and I-127 in seawater and implications for sources and transport pathways in the North Sea
2007 (English)In: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 41, no 17, 5993-5999 p.Article in journal (Refereed) Published
Surface seawater samples collected from the North Sea and English Channel were analyzed for total 129I and 127I, as well as for iodide and iodate. Relatively high 129I concentrations (2−3 × 1011 atoms/L) were observed in the northern part of the English Channel and in the southeastern North Sea. The atomic ratio of 129I/127I decreases from the eastern (1.0−1.9 × 10-6) to the western (4−6 × 10-8) parts of the North Sea and from the northeastern (1.5 × 10-6) to southwestern (1−5 × 10-8) parts of the English Channel. The ratios of iodide to iodate are 0.1−0.5 and 0.5−1.6 for 127I and 129I, respectively, in open seawaters, whereas these ratios range from 0.6 to 1.3 and 0.8 to 2.2, respectively, in coastal waters. The results suggest that (1) imprints of the La Hague facility dominates the 129I distribution in the surface water of the North Sea, (2) reduction of iodate to iodide is relatively fast during the transport to the European continental coast, (3) oxidation of newly produced 129I- to 129IO3- is insignificant during water exchange between the coastal area and open sea, (4) reduction of iodate and oxidation of iodide in the open sea seems to be a slow process.
Place, publisher, year, edition, pages
2007. Vol. 41, no 17, 5993-5999 p.
Atlantic Ocean, North Atlantic, English Channel, North Sea, Fission reactor fuel reprocessing, Fuel reprocessing plants, Pollution source, Transport process, Speciation, Pollutant behavior, Iodides, Iodates, Iodine 129, Iodine 127, Radioisotope, Radioactive pollution, Seawater, Water pollution
Natural Sciences Engineering and Technology
IdentifiersURN: urn:nbn:se:uu:diva-13579DOI: 10.1021/es070575xISI: 000249240100019PubMedID: 17937272OAI: oai:DiVA.org:uu-13579DiVA: diva2:41349