Variation in background concentrations and specific activities of 36Cl, 129I and U/Th-series radionuclides in surface waters

Sheppard, S. C.; Herod, Matthew N.

doi:10.1016/j.jenvrad.2011.10.015

Cited by 13 publications

(2 citation statements)

References 8 publications

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“…Iodine was extracted from samples of precipitation and groundwater using the silver iodide precipitation method with stable 127 I carrier ( 129 I/ 127 I: 15.6 ± 0.6 × 10 −14 ) as described in Sheppard and Herod [] and Herod et al . [].…”

Section: Methodsmentioning

confidence: 99%

The atmospheric transport of iodine‐129 from Fukushima to British Columbia, Canada and its deposition and transport into groundwater

Herod

Suchy

Cornett

et al. 2015

Water Resources Research

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The Fukushima-Daiichi nuclear accident (FDNA) released iodine-129 (15.7 million year half-life)and other fission product radionuclides into the environment in the spring and summer of 2011. 129 I is recognized as a useful tracer for the short-lived radiohazard 131 I, which has a mobile geochemical behavior with potential to contaminate water resources. To trace 129 I released by the FDNA reaching Canada, preaccident and post-accident rain samples collected in Vancouver, on Saturna Island and from the National Atmospheric Deposition Program in Washington State were measured. Groundwater from the AbbotsfordSumas Aquifer was sampled to determine the fate of 129 I that infiltrates below the root zone. Modeling of vadose zone transport was performed to constrain the travel time and retardation of 129 I. The mean preaccident 129 I concentration in rain was 31 3 10 6 atoms/L (n 5 4). Immediately following the FDNA, 129 I values increased to 211 3 10 6 atoms/L and quickly returned to near-background levels. However, pulses of elevated 129 I continued for several months. The increases in 129 I concentrations from both Vancouver and Saturna Island were synchronized, and occurred directly after the initial release from the FDNA. The 129 I in shallow ( 3 H/ 3 He age <1.4 years) Wassenaar et al. (2006) groundwater showed measurable variability through March 2013 with an average of 3.2 3 10 6 atoms/L (n 5 32) that was coincident with modeled travel times for Fukushima 129 I. The groundwater response and the modeling results suggest that 129 I was partially attenuated in soil, which is consistent with its geochemical behavior; however, we conclude that the measured variability may be due to Fukushima 129 I entering groundwater.

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Section: Methodsmentioning

confidence: 99%

The atmospheric transport of iodine‐129 from Fukushima to British Columbia, Canada and its deposition and transport into groundwater

Herod

Suchy

Cornett

et al. 2015

Water Resources Research

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“…The primary source of 129 I in North America today is wet deposition of 129 I from long-range atmospheric transport of 129 I from European fuel reprocessing, recycled 129 I from weapons testing and ocean volatilization (Wetherbee et al 2012). It is well known that the atmospheric deposition of 129 I in North America is much lower than western Europe, and the 129 I concentration in North American rivers and rain reflects this (Santschi and Schwehr 2004;Sheppard and Herod 2012). 129 I has been investigated in several sites in Ontario and around Ottawa.…”

Section: I and 127 I Concentrations In Urinementioning

confidence: 99%

A Rapid and Efficient Autoclave Pre-Treatment to Extract Iodine-129 from Urine Samples for AMS Analysis

Alotaibi

Mn²,

Rj³

2020

Preprint

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A new method was developed to extract 129I from urine samples and then measure it by AMS. The samples were pre-treated in an autoclave with hydrogen peroxide to remove unwanted compounds from the urine samples and were acidified with nitric acid, followed by precipitation of iodine as silver iodide (AgI) for measurement by AMS. This new procedure is substantially faster than previous methods for the extraction of iodine from urine and results in less chemical waste. The efficiency and reproducibility of this method were evaluated by using 125I as a yield tracer, eventually giving a recovery above 99%. To achieve this, several iterations of the method were required. The method was then successfully applied to measure 129I/127I isotopic ratios and 129I concentrations in 25 human urine samples. The AMS results for 129I in urine ranged 3.3 x 106 atoms/L to 884 x 106 atoms/L and the isotope ratio (129I/127I) in human urine ranged from 7.38 x 10-12 to 3.97 x 10-10 with a median of 1.29 x 10-10. This new method will be useful for investigations into the sources of iodine in the human diet and their relative importance for iodine sufficiency.

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Thermodynamic Study of the Chlorine Content of Stainless Steel

Königsberger

Spahiu

Herschend

2021

Metall Mater Trans B

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Variation in background concentrations and specific activities of 36Cl, 129I and U/Th-series radionuclides in surface waters

Cited by 13 publications

References 8 publications

The atmospheric transport of iodine‐129 from Fukushima to British Columbia, Canada and its deposition and transport into groundwater

The atmospheric transport of iodine‐129 from Fukushima to British Columbia, Canada and its deposition and transport into groundwater

A Rapid and Efficient Autoclave Pre-Treatment to Extract Iodine-129 from Urine Samples for AMS Analysis

Thermodynamic Study of the Chlorine Content of Stainless Steel

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