TY - JOUR
T1 - Iodide and iodate ( 129I and 127I) in surface water of the Baltic Sea, Kattegat and Skagerrak
AU - Hansen, Violeta
AU - Yi, Peng
AU - Hou, Xiaolin
AU - Aldahan, Ala
AU - Roos, Per
AU - Possnert, Göran
N1 - Funding Information:
Funding for the sampling was provided by the Swedish Meteorological and Hydrological Institute (SMHI). We thank Lars Andersson and Bodil Thorstensson and all the crew and scientific team on board of the research vessel Argos for the help during the sampling expeditions. X.L. Hou appreciates the support by “BaiRen” Project of CAS (Grant No. KZCX2-YW-BR-13 ).
PY - 2011/12/15
Y1 - 2011/12/15
N2 - Despite the common incorporation of iodine in the biological cycle and occurrence of huge contamination of the radioactive isotope 129I in the Baltic Proper, Skagerrak and Kattegat, there is no data on chemical speciation of iodine in these waters. We here present first time data on iodine isotopes 129I and 127I species as iodide and iodate in surface seawater samples collected from 16 locations in August 2006 and 19 locations in April 2007 in the Baltic Proper, Skagerrak and Kattegat. After extensive separation methods, the isotopes concentrations were determined using accelerator mass spectrometry (AMS) technique for the 129I and inductively coupled plasma mass spectroscopy (ICP-MS) for 127I. High concentrations of both isotopes species were found in the Skagerrak-Kattegat basins, whereas the values in the Baltic Proper are low for both species. The ratios of 129I -/ 129IO 3 - and 127I -/ 127IO 3 - significantly increase from south to central Baltic Sea, and iodide (both isotopes) appears as the predominant inorganic iodine species along the Baltic Sea. The results show insignificant change in 129I and 127I speciation and suggest that reduction of iodate and oxidation of iodide in Skagerrak and Kattegat may be a slow process. Additionally, the positive correlation between salinity and iodide and iodate (both isotopes) may reflect effective control of Skagerrak water mass on iodine distribution in surface water of the Baltic Sea.
AB - Despite the common incorporation of iodine in the biological cycle and occurrence of huge contamination of the radioactive isotope 129I in the Baltic Proper, Skagerrak and Kattegat, there is no data on chemical speciation of iodine in these waters. We here present first time data on iodine isotopes 129I and 127I species as iodide and iodate in surface seawater samples collected from 16 locations in August 2006 and 19 locations in April 2007 in the Baltic Proper, Skagerrak and Kattegat. After extensive separation methods, the isotopes concentrations were determined using accelerator mass spectrometry (AMS) technique for the 129I and inductively coupled plasma mass spectroscopy (ICP-MS) for 127I. High concentrations of both isotopes species were found in the Skagerrak-Kattegat basins, whereas the values in the Baltic Proper are low for both species. The ratios of 129I -/ 129IO 3 - and 127I -/ 127IO 3 - significantly increase from south to central Baltic Sea, and iodide (both isotopes) appears as the predominant inorganic iodine species along the Baltic Sea. The results show insignificant change in 129I and 127I speciation and suggest that reduction of iodate and oxidation of iodide in Skagerrak and Kattegat may be a slow process. Additionally, the positive correlation between salinity and iodide and iodate (both isotopes) may reflect effective control of Skagerrak water mass on iodine distribution in surface water of the Baltic Sea.
KW - AMS
KW - Baltic Sea speciation
KW - I
KW - I
KW - ICP-MS
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U2 - 10.1016/j.scitotenv.2011.10.001
DO - 10.1016/j.scitotenv.2011.10.001
M3 - Article
C2 - 22033356
AN - SCOPUS:84855821919
SN - 0048-9697
VL - 412-413
SP - 296
EP - 303
JO - Science of the Total Environment
JF - Science of the Total Environment
ER -