Thesis for the Degree of Doctor of Philosophy - DTU Orbit

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Table 6 Adsorption of iodine species in fresh water onto activated charcoal previously washed with double distilled water and/or ethanol. The total concentration (iodide + iodate + organic iodine) in the Danish lake water used in all experiments was 20.6 ppb. The volume of water was 200ml in all experiments. Experiment number 1 AC-DDW washed 2 AC-DDW washed 3 AC-DDW washed 4 AC-DDW washed 5 AC-DDW washed 6 AC-DDW washed 7 AC-DDW washed 8 AC-DDW washed 9 AC-EtOH washed 10 AC-EtOH washed 11 AC-EtOH washed 12 AC-EtOH washed 13 AC-EtOH washed 14 AC-EtOH washed 15 AC-EtOH washed Adsorbant Experiment setting The fraction of 127 I that remains in the water phase after batch experiment (%) 1 g AC (size 0,5-1mm) /1h Stirring/RT/filtered 10 1 g AC (size 0,5-1mm) /2h Stirring/RT/ filtered 8.7 1 g AC (size 0,5-1mm)/4h Stirring/RT/ filtered 7.6 1 g AC (size 0,5-1mm) /8h Stirring/RT/filtered 9.6 5 g AC (size 0,5-1mm) /2h Stirring/RT/ filtered 2 5 g AC (size 0,5-1mm) /4h Stirring/RT/ filtered 2 5 g AC (size 0,5-1mm) /8h Stirring/RT/filtered 2.6 5 g AC (size 0,5-1mm) /16h Stirring/RT/filtered 5.1 1 g AC (size 0,5-1mm)/1h Stirring/RT/filtered 1 g AC (size 0,5-1mm)/2h Stirring/RT/ filtered 4.5 1 g AC (size 0,5-1mm) /4h Stirring/RT/ filtered 7 1 g AC (size 0,5-1mm)/ 8h Stirring/RT/ filtered 13 5 g AC (size 0,5-1mm)/1h Stirring/RT/ filtered 3.8 5 g AC (size 0,5-1mm)/4h Stirring/RT/ filtered 3 5 g AC (size 0,5-1mm)/8h Stirring/RT/ filtered 2 16 AC-EtOH washed 5 g AC (size 0,5-1mm) /16h Stirring/RT/ filtered 11.2 AC-activated charcoal; DDW-double distilled water; EtOH-ethanol; RT-room temperature 15 40
Table 7 Adsorption of iodine species onto DEAE 32 cellulose for total iodine concentration determination The total concentration (iodide + iodate + organic iodine) in the water used in all experiments was 20.6 ppb. The volume of water was 200ml in all experiments. Experiment number Experiment setting The fraction of 127 I that remains in the water phase after batch experiment (%) 19 1g DEAE 32 cellulose/8h Stirring/RT/ filtered 24.6 20 1g DEAE 32 cellulose/2h Stirring/RT/ filtered 24.1 21 1g DEAE 32 cellulose/4h Stirring/RT/ filtered 21.6 22 5g DEAE 32 cellulose/4h Stirring/RT/ filtered 10.1 23 5g DEAE 32 cellulose/8h Stirring/RT/ filtered 10.1 24 5g DEAE 32 cellulose/16h Stirring/RT/ filtered 15.9 RT - room temperature Adsorption of iodine species onto activated charcoal and DEAE 32 cellulose from seawater samples shows that only 12-17% of the total iodine in seawater can be adsorbed onto those materials (Table 8). The large concentration of anions and competitive large ions that are present in the seawater are likely to block the active exchange sites and thus results in low adsorption of iodine species. Table 8 Adsorption of iodine species onto activated charcoal and DEAE 32 cellulose from seawater. The total concentration (iodide + iodate + organic iodine) in the water used in all experiments was 35 ppb. The volume of seawater was 200ml in all experiments. Experiment number 17 AC-DDW washed Adsorbant Experiment setting The fraction of 127 I that remains in the water phase after batch experiment (%) 5 g AC (size 0,5-1mm)/4h Stirring/RT/filtered 83.7 18 DEAE 32 cellulose 5g DEAE 32 cellulose/4h Stirring/RT/ filtered 88.2 AC - activated charcoal; DDW - double distilled water; RT- room temperature The results of this study reveal that the absorption of inorganic and organic iodine species onto AC or DEAE 32 cellulose has a very limited practical use during normal environmental conditions as a method for quantification of total iodine-129 in freshwater and seawater. 3.1.3 Quantification of total iodine-129 species in fresh water by K2S2O8 oxidation of iodine organic matter (unpublished results). Persulfate oxidation of aquatic organic matter has previously been employed (Cuypers et al., 2000; Bronk et al., 2000) in order to destroy the organic matter. The experiments performed in this study show that iodine may be released from organic matter when 200 mL of water sample is mixed with K2S2O8 to obtain an aqueous persulfate concentration of 0.01M (Table 41
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: experiment was subjected to combust
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 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
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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
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conversion process between iodide a
Page 113 and 114:
Table 1 Analytical results of 129 I
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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
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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
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
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espectively. The iodine was leached
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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
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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
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water in winter by molecular oxygen
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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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