Thesis for the Degree of Doctor of Philosophy - DTU Orbit

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• Analyses of iodine-129 and iodine -127 time series in Fucus Vesiculosus collected in Denmark over the last 10 years are presented. Yields ratios of 129 I/ 127 I (seaweed) relative 129 I/ 127 I (seawater) were found to be 0.5 for North Sea (2005), 0.7 (2006) for Southern Kattegat and 0.97 (2007) for Bornholm indicating that Fucus Vesiculosus can be used as bio-indicator organisms for iodine-129 in marine environment since they reflect the iodine-129 in water. The results further show that the iodide is more efficient to accumulate than iodate in Fucus. The high enrichment of iodine in Fucus may however be explained not only by preferential uptake of iodide since a significant increase of 127 I in Fucus occur mostly in autumn – winter even different speciation of 127 I in all three investigated studies occur. Several factors such as various physical parts of the plant, salinity, temperature, content of organic matter and nutrients concentration in seawater may also control the mechanism of iodine uptake in Fucus. Nevertheless, the data presented here has shown that the Fucus Vesiculosus may accumulate preferential iodine as iodide. 54
Reference Aldahan A, Kekli A, Possnert G. 2006. Distribution and sources of 129 I in rivers of the Baltic region. J. Environ. Ra dioact. 88: 49-73. Aldahan A, Englund E, Possnert G, Cato I, Hou XL. 2007. Iodine-129 enrichment in sediment of the Baltic Sea, Applied Geochemistry 22, 637–647. Alfimov V, Aldahan A, Possnert G, Winsor P. 2004. Anthropogenic iodine- 129I in seawater along a transect from the Norwegian coastal current to the North Pole.Mar. Pollut. Bull. 49, 1097–1104. AlfimovV. 2005. Accelerator mass spectrometry of 36Cl and 129I. Analytical aspects and applications.PhD thesis. Amachi S, Kasahara M, Fujii T, Shinoyama H, Hanada S, Kamagata Y, Bannai T, Muramatsu Y. 2004. Radiotracer experiments on biological volatilization of organic iodine from coastal seawaters. Geomicrobiol. J. 21, 481-488. Andersson, K. G., Qiao, J. and Hansen V., 2009. On the requirements to optimize restoration of radioactively contaminated soil areas, in: Steinberg, R.V. (Eds.), Contaminated soils: Environmental Impact, Disposal and Treatment, NOVA Science Publishers, ISBN 978-1-60741-791-0. Chapter 15, pp. 419-432 Aumann DC, Faleschini H, Friedmann L. 1981. Determination of 129 I and 127 I at natural levels by neutron activation analysis. Radiochimica Acta 29, 209 - 215. Bienvenu P, Brochard E, Excoffier E, Piccione C. 2004. Determination of Iodine 129 by ICP-QMS in Environmental Samples. J. Anal. Sci. Spectrosc. 49, 423–429. Bronk DA, Lomas MW, Glibert PM, Schukert KJ, Sanderson MP. 2000. Total dissolved nitrogen analysis: comparison between the persulfate, UV and high temperature oxidation methods. Marine Chemistry 69, 163-178. Brown CF, Geiszler KN and Lindberg M J. 2007. Analysis of 129 I in groundwater samples: Direct and quantitative results below the drinking water standard. Appl. Geochem., 22, 648. Buraglio N. 2000a. Accelerator Mass Spectrometry of 129I and its applications in natural water system. PhD thesis. Buraglio N, Aldahan A, Possnert G. 2000b. 129I measurements at the Uppsala tandem accelerator. Nucl. Instrum. Meth. B161, 240–244. 55
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Chemical Speciation Analysis and En
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Thesis for the Degree of Doctor of
Page 5 and 6: Abstract This thesis deals with che
Page 7 and 8: environment since they reflect the
Page 9 and 10: organiske jodformer. Adsorption af
Page 11 and 12: None of this would have been possib
Page 13 and 14: Abbreviations and acronyms b+ - pos
Page 15 and 16: 3.1 Analytical Development………
Page 17 and 18: Table 1 Some properties of iodine P
Page 19 and 20: In soils/sediments iodine occurs as
Page 21 and 22: Table 2 Nuclear properties of iodin
Page 23 and 24: Liquid scintillation counting (LSC)
Page 25 and 26: The bioavailability of radioactive
Page 27 and 28: data (Englund et al., 2010; Hou et
Page 29 and 30: 2. Analytical procedures used in th
Page 31 and 32: 2.3 Quantification of total iodine
Page 33 and 34: Fig. 5 Quantification of total iodi
Page 35 and 36: iodate were measured by counting 12
Page 37 and 38: Fig. 6 Sequential extraction proced
Page 39 and 40: a Fig. 8 Calibration curve for (a)
Page 41 and 42: experiment was subjected to combust
Page 43 and 44: Table 7 Adsorption of iodine specie
Page 45 and 46: numbers 11-14), which is about the
Page 47 and 48: marine environment from nuclear fue
Page 49 and 50: 127 I - (ppb) 127 IO3 - (ppb) a b 1
Page 51 and 52: Although the oxygen concentration d
Page 53 and 54: 129 I TBq 2,00E+00 1,80E+00 1,60E+0
Page 55: • Adsorption of iodine species on
Page 59 and 60: Fuge R& Johnson C. 1986. The geoche
Page 61 and 62: Lo´pez-Gutie´rrez JM, Garcı ´a-
Page 63 and 64: Shinohara K. 2004. Measurement and
Page 65 and 66: http://www.irsn.fr/EN/news/Document
Page 67 and 68: Review Analytica Chimica Acta 632 (
Page 69 and 70: Table 1 Nuclear properties and prod
Page 71 and 72: Fig. 2. Liquid discharges of 129 I
Page 73 and 74: Fig. 5. Schematic diagram and pictu
Page 75 and 76: 129 I in iodide and iodate is then
Page 77 and 78: Fig. 8. Diagram of air sampler for
Page 79 and 80: Fig. 10. Iodine L3-edge (a) and K-e
Page 81 and 82: analysis of 129 I in water sample a
Page 83 and 84: Yi P, Aldahan A, Hansen V, Possnert
Page 85 and 86: FIGURE 1. Sampling sites (the red s
Page 87 and 88: FIGURE 3. Horizontal distribution o
Page 89 and 90: FIGURE 5. Time series data of 129 I
Page 91 and 92: Environmental Science & Technology
Page 93 and 94: prepared using KI and KIO3. No diff
Page 95 and 96: of their contribution to the Baltic
Page 97 and 98: Fig. S-1 Sampling sites (the red so
Page 99 and 100: Fig. S-3 Vertical distribution of I
Page 101 and 102: Fig. S-5 Marine discharges function
Page 103 and 104: Fig.S-7 Relationship between I-129
Page 105 and 106: Table S-1 Results of I-129 and I-12
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S17
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Paper III Hansen,V., Yi, P., Hou, X
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conversion process between iodide a
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Table 1 Analytical results of 129 I
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August April I-129 iodide ( 10 8 at
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References Aldahan A, Kekli A, Poss
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Partition of iodine ( 129 I and 127
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Norway (Table 1). CTD-casts with ox
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5. Discussion 5.1. Separation of hu
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In the present study 40e60% of 129
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Hutta, M., Gora, R., 2003. Novel st
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Analysis of 129 I and 127 I in arch
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et al., 2002). Due to the fact that
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espectively. The iodine was leached
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salinities in the same area. Apart
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North Sea. 129 I/ 127 I ratios in w
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Table 2 Analytical results of 129-I
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129 I/ 127 I 1,40E-07 1,20E-07 1,00
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References Aldahan A, Englund E, Po
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O’Dowd, C.; Jimenez, J. L.; Bahre
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Iodine ( 129 I and 127 I) speciatio
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water in winter by molecular oxygen
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0.2 M KNO3. The effluent and the wa
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maximum values is at 0.03-0.06×10
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into the English Channel from the L
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References Aldahan A, Kekli A, Poss
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Risø-PhD-81(EN)
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Thesis for the Degree of Doctor of Philosophy - DTU Orbit

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