Effect of aging on availability of iodine in grassland soil collected in Rokkasho, Japan

Takeda, Akira; Tsukada, Hirofumi; Takaku, Yuichi; Hisamatsu, Shun’ichi

doi:10.1007/s10967-014-3457-7

Cited by 5 publications

(1 citation statement)

References 10 publications

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“…This is in agreement with a study looking at long-term inputs and outputs of iodine into UK pastures (Bowley et al, 2017). This reinforces the view that iodine species, primarily iodide and iodate, are immobile in soils (Takeda et al, 2015), and thus iodide predominantly present in fresh depositional inputs are the driver of iodine transfer through into vegetation (Gilfedder et al, 2008;Suess et al, 2019). To place the depositional findings in context, they can be considered with respect to soil stores and grass offtake.…”

Section: Discussionsupporting

confidence: 87%

Feed-derived iodine overrides environmental contribution to cow milk

McKernan

Meharg

Carey

et al. 2020

Journal of Dairy Science

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Iodine is deficient in diets worldwide, leading to a range of undesirable health affects at the population level. Dairy products are a primary source of iodine in the diets for those populations in which iodised salt is not systematically utilised or available. Yet, the flows of iodine through dairy agroecosystems are not well understood. The aim of this research was to investigate iodine flows though the dairy agroecosystem; including the influence of atmospheric depositional inputs, environmental variables, season, husbandry and diet. Three farm based sampling campaigns were conducted in this investigation with milk, soil, silage, grass and feed iodine determined by inductively coupled plasma-mass spectroscopy, and non-parametric statistical analysis tests were conducted on data sets obtained. Natural iodine inputs into the environment are dominated by atmospheric deposition, which was dominated by sea spray, and thus location of farms to coast and prevailing wind direction. Herbage, and silage produced from herbage, strongly correlated with soil iodine, yet there was a strong disconnect between soil, forage and feed and the milk that results. This was due to the levels of iodine in supplemental feeds being ~10-fold higher than in forage derived feeds. The practice of feed supplementation, accentuated by summer housing of cows, led to elevated milk iodine.

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Section: Discussionsupporting

confidence: 87%

Feed-derived iodine overrides environmental contribution to cow milk

McKernan

Meharg

Carey

et al. 2020

Journal of Dairy Science

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Processes affecting land-surface dynamics of 129I impacted by atmospheric 129I releases from a spent nuclear fuel reprocessing plant

Ota

Terada

Hasegawa

et al. 2020

Science of The Total Environment

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Changes in the chemical form of exogenous iodine in forest soils and their extracts

Takeda

Tsukada

Takahashi

et al. 2015

Radiation Protection Dosimetry

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Information about the chemical form of exogenous iodine in soil is important for predicting the mobility and behaviour of radioiodine in the terrestrial environment. In this study, soil samples collected at various depths in a pine forest in Rokkasho, Japan, were spiked with stable iodine (as iodide or iodate); after incubation of the spiked soils for 1 or 14 d, the chemical forms of iodine were investigated in both the soils and their water extracts. In surface soil and its extracts, inorganic iodine was found to have been transformed to organically bound forms after incubation for 14 d, resulting in a decrease in the amount of water-extractable iodine in the soil. In contrast, in subsurface soil, which had low organic matter content, the predominant chemical form of iodine after incubation did not differ from that in the spiked soil, and the amount of water-extractable iodine did not decrease noticeably.

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Effect of aging on availability of iodine in grassland soil collected in Rokkasho, Japan

Cited by 5 publications

References 10 publications

Feed-derived iodine overrides environmental contribution to cow milk

Feed-derived iodine overrides environmental contribution to cow milk

Processes affecting land-surface dynamics of 129I impacted by atmospheric 129I releases from a spent nuclear fuel reprocessing plant

Changes in the chemical form of exogenous iodine in forest soils and their extracts

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