Thesis for the Degree of Doctor of Philosophy - DTU Orbit

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Hansen Violeta & Roos Per. 2011. Spatial and temporal variation of 129 I and 127 I by analysis of archived Fucus Vesiculosus samples from Denmark, Manuscript Paper V
Analysis of 129 I and 127 I in archived Fucus Vesiculosus samples from Denmark Violeta Hansen 1 & Per Roos 1 1 Risø National Laboratory for Sustainable Energy NUK-202, Technical University of Denmark, DK-4000 Roskilde, Denmark Abstract Marine algae play an important role in the global cycle of iodine in the environment in the sense that they accumulate seawater iodine at high concentration levels and have the ability to transform iodine into volatile forms. In this study spatial and temporal trends in 129 I and 127 I concentrations in archived Fucus Vesiculosus samples collected from Rømø in the North Sea, Klint in the Kattegat, and Bornholm in the Baltic Sea have been evaluated using AMS and ICP- MS respectively. Concentrations of 129 I in Fucus from Rømø, North Sea proved to be at least one order of magnitude higher than concentration in Fucus from Bornholm, Baltic Sea. The 129 I content of Fucus increased significantly between 1986 and 2010. 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. Furthermore our data reveal that the iodide is more efficient to accumulate than iodate in Fucus. Key words: 129 I, 127 I, Fucus Vesiculosus, alkaline digestion, AMS, ICP-MS, Baltic Sea, North Sea. 1. Introduction 1
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Chemical Speciation Analysis and En
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Thesis for the Degree of Doctor of
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Abstract This thesis deals with che
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environment since they reflect the
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organiske jodformer. Adsorption af
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None of this would have been possib
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Abbreviations and acronyms b+ - pos
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3.1 Analytical Development………
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Table 1 Some properties of iodine P
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In soils/sediments iodine occurs as
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Table 2 Nuclear properties of iodin
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Liquid scintillation counting (LSC)
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The bioavailability of radioactive
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data (Englund et al., 2010; Hou et
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2. Analytical procedures used in th
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2.3 Quantification of total iodine
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Fig. 5 Quantification of total iodi
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iodate were measured by counting 12
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Fig. 6 Sequential extraction proced
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a Fig. 8 Calibration curve for (a)
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experiment was subjected to combust
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Table 7 Adsorption of iodine specie
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numbers 11-14), which is about the
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marine environment from nuclear fue
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127 I - (ppb) 127 IO3 - (ppb) a b 1
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Although the oxygen concentration d
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129 I TBq 2,00E+00 1,80E+00 1,60E+0
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• Adsorption of iodine species on
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Reference Aldahan A, Kekli A, Possn
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Fuge R& Johnson C. 1986. The geoche
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Lo´pez-Gutie´rrez JM, Garcı ´a-
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Shinohara K. 2004. Measurement and
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http://www.irsn.fr/EN/news/Document
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Review Analytica Chimica Acta 632 (
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Table 1 Nuclear properties and prod
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Fig. 2. Liquid discharges of 129 I
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Fig. 5. Schematic diagram and pictu
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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
Page 107 and 108: S17
Page 109 and 110: Paper III Hansen,V., Yi, P., Hou, X
Page 111 and 112: conversion process between iodide a
Page 113 and 114: Table 1 Analytical results of 129 I
Page 115 and 116: August April I-129 iodide ( 10 8 at
Page 117 and 118: References Aldahan A, Kekli A, Poss
Page 119 and 120: Partition of iodine ( 129 I and 127
Page 121 and 122: Norway (Table 1). CTD-casts with ox
Page 123 and 124: 5. Discussion 5.1. Separation of hu
Page 125 and 126: In the present study 40e60% of 129
Page 127: Hutta, M., Gora, R., 2003. Novel st
Page 131 and 132: et al., 2002). Due to the fact that
Page 133 and 134: espectively. The iodine was leached
Page 135 and 136: salinities in the same area. Apart
Page 137 and 138: North Sea. 129 I/ 127 I ratios in w
Page 139 and 140: Table 2 Analytical results of 129-I
Page 141 and 142: 129 I/ 127 I 1,40E-07 1,20E-07 1,00
Page 143 and 144: References Aldahan A, Englund E, Po
Page 145 and 146: O’Dowd, C.; Jimenez, J. L.; Bahre
Page 147 and 148: Iodine ( 129 I and 127 I) speciatio
Page 149 and 150: water in winter by molecular oxygen
Page 151 and 152: 0.2 M KNO3. The effluent and the wa
Page 153 and 154: maximum values is at 0.03-0.06×10
Page 155 and 156: into the English Channel from the L
Page 157 and 158: References Aldahan A, Kekli A, Poss
Page 160 and 161: Risø-PhD-81(EN)
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Thesis for the Degree of Doctor of Philosophy - DTU Orbit

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