Thesis for the Degree of Doctor of Philosophy - DTU Orbit

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the anion exchange chromatography method of Hou et al. (2007) coupled with accelerator mass spectrometry (AMS) and inductively coupled plasma mass spectrometry (ICP-MS) respectively to investigate 129 I and 127 I speciation as iodide and iodate and total inorganic iodine in seawater profile samples collected from 16 locations in August 2006 and 19 locations in April 2007 in the Baltic Proper, Skagerrak and Kattegat. Our results are in agreement with previously published data (Hou et al., 2001, Hou et al., 2002) supporting a clearly decreasing gradient of concentrations of 129 I from northern Kattegat to the Baltic Sea (in Paper II). Previous data on surface water in the English Channel indicate 129 I-iodate as being the predominate species form, while in surface water of central and northern parts of the North Sea, relatively high concentrations of 129 I-iodide were reported (Hou et al., 2007). A similar speciation pattern is also shown by the results presented here (in Paper III) for the surface water samples collected from the Skagerrak-Kattegat. Through the Baltic Sea high values of 129 I - / 129 IO3 - (2.4-30.5 in April 2007 and 2.4-99.2 in August 2006) was observed, especially in surface water (in Paper III). Thus, most 129 IO3 - becomes reduced to 129 I - as North Sea water is flowing from Kattegat through the Belt Sea and mixes with the Baltic Sea water (In paper III). However, this reduction may not necessarily take place in the oxygen deficient waters but may rather be due to biotic factors, taking place in the surface. The depletion of 129 IO3 - and enrichment of 129 I - , in the surface water of the south Baltic Sea during the summer 2006 (algal bloom) and spring 2007 may be linked to the reduction of NO3 - to NO2 - by marine organism uptake. Recent literature (Campos et al., 1999; Wong, 2001) assumes that the NO3 - and IO3 - are taken up by marine organism in surface sea water and almost all of the IO3 - is released as I - . The distribution of NO3 - concentrations in the same geographic region as was covered in this work were obtained from the WORLD OCEAN DATABASE (http://www.nodc.noaa.gov). These data show similar pattern of NO3 - /NO2 - and 129 IO3 - / 129 I - in the south Baltic Sea during the summer 2006 and spring 2007(unpublished results). 46
127 I - (ppb) 127 IO3 - (ppb) a b 129 I - (10 8 atoms/L) 129 I - / 127 I - (10 -8 ) 129 IO3 - (10 8 atoms/L) c d e f 129 IO3 - / 127 IO3 - (10 -8 ) Fig. 11 Distribution of 127 I - , 127 IO3 - , 129 I - , 129 IO3 - , 129 I - / 127 I - and 129 IO3 - / 127 IO3 - (a-f) in the bottom water of Skagerrak, Kattegat and Baltic Sea for samples collected in August 2006. 47
Page 1 and 2: Chemical Speciation Analysis and En
Page 3 and 4: 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: marine environment from nuclear fue
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 and 56: • Adsorption of iodine species on
Page 57 and 58: Reference Aldahan A, Kekli A, Possn
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
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 and 128:
Hutta, M., Gora, R., 2003. Novel st
Page 129 and 130:
Analysis of 129 I and 127 I in arch
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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