Flux and pathway of iodine dissolution from brackish lake sediment in the northeast of Japan

Satoh, Yuhi; Imai, Shoko

doi:10.1016/j.scitotenv.2021.147942

Cited by 3 publications

(5 citation statements)

References 48 publications

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“…In soils, estuaries and marine systems an organoiodate has been found to form concurrently with the removal of inorganic iodate (Francois, 1987;Luther et al, 1991). When considering whether there is iodide or iodate within organic structures it has been found that iodate forms the more reactive form of DOI in both ex situ seawaters amended with humic acid and porewaters fluxing from sediments (Francois, 1987;Bowley et al, 2016;Satoh and Imai, 2021). In laboratory experiments that had no external forcing, i.e., no advanced oxidation processes such as photochemistry or ozonation, organoiodate had a half-life of circa 10 d (Bowley et al, 2016).…”

Section: Dissolved/particulate Organic Iodinementioning

confidence: 99%

“…In interstitial porewaters, the iodine species derive from organic material remineralization in oxygenated (Francois, 1987) or anoxic sediments (Ullman and Aller, 1980) or following iodate reduction in hypoxic or suboxic sediments (Chapman and Truesdale, 2011). Solution phase iodine species is scavenged at the oxic interface by ferro-manganese minerals or other reactions relating to soluble phase metal cycling and/or organic material cycling (Harvey, 1980;Ullman and Aller, 1985;Francois, 1987;Luther et al, 1997;Anschutz et al, 2000;Satoh and Imai, 2021).…”

Section: Sediment-water Interactionsmentioning

confidence: 99%

“…Nevertheless, oxygenated sediments can also be a source of iodide to overlying waters and iodide fluxes increase as oxygen concentrations decrease (Chapman and Truesdale, 2011;Satoh and Imai, 2021;Ooki et al, 2022).…”

Section: Sediment-water Interactionsmentioning

confidence: 99%

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Iodide, iodate & dissolved organic iodine in the temperate coastal ocean

Jones,

Chance,

Bell

et al. 2024

Front. Mar. Sci.

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The surface ocean is the main source of iodine to the atmosphere, where it plays a crucial role including in the catalytic removal of tropospheric ozone. The availability of surface oceanic iodine is governed by its biogeochemical cycling, the controls of which are poorly constrained. Here we show a near two-year time series of the primary iodine species, iodide, iodate and dissolved organic iodine (DOI) in inner shelf marine surface waters of the Western English Channel (UK). The median ± standard deviation concentrations between November 2019 and September 2021 (n=76) were: iodide 88 ± 17 nM (range 61-149 nM), iodate 293 ± 28 nM (198-382 nM), DOI 16 ± 16 nM (<0.12-75 nM) and total dissolved iodine (dIT) 399 ± 30 nM (314-477 nM). Though lower than inorganic iodine ion concentrations, DOI was a persistent and non-negligible component of dIT, which is consistent with previous studies in coastal waters. Over the time series, dIT was not conserved and the missing pool of iodine accounted for ~6% of the observed concentration suggesting complex mechanisms governing dIT removal and renewal. The contribution of excess iodine (I*) sourced from the coastal margin towards dIT was generally low (3 ± 29 nM) but exceptional events influenced dIT concentrations by up to ±100 nM. The seasonal variability in iodine speciation was asynchronous with the observed phytoplankton primary productivity. Nevertheless, iodate reduction began as light levels and then biomass increased in spring and iodide attained its peak concentration in mid to late autumn during post-bloom conditions. Dissolved organic iodine was present, but variable, throughout the year. During winter, iodate concentrations increased due to the advection of North Atlantic surface waters. The timing of changes in iodine speciation and the magnitude of I* subsumed by seawater processes supports the paradigm that transformations between iodine species are biologically mediated, though not directly linked.

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Section: Dissolved/particulate Organic Iodinementioning

confidence: 99%

Section: Sediment-water Interactionsmentioning

confidence: 99%

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Iodide, iodate & dissolved organic iodine in the temperate coastal ocean

Jones,

Chance,

Bell

et al. 2024

Front. Mar. Sci.

View full text Add to dashboard Cite

show abstract

“…In soils, estuaries and marine systems an organoiodate has been found to form concurrently with the removal of inorganic iodate (Francois, 1987;. When considering whether there is iodide or iodate within organic structures it has been found that iodate forms the more reactive form of DOI in both ex situ seawaters amended with humic acid and porewaters fluxing from sediments (Francois, 1987;Bowley et al, 2016;Satoh and Imai, 2021). In laboratory experiments that had no external forcing, i.e., no advanced oxidation processes such as photochemistry or ozonation, organoiodate had a half-life of circa 10 d (Bowley et al, 2016).…”

Section: Dissolved/particulate Organic Iodinementioning

confidence: 99%

“…In interstitial porewaters, the iodine species derive from organic material remineralization in oxygenated (Francois, 1987) or anoxic sediments or following iodate reduction in hypoxic or suboxic sediments (Chapman and Truesdale, 2011). Solution phase iodine species is scavenged at the oxic interface by ferro-manganese minerals or other reactions relating to soluble phase metal cycling and/or organic material cycling Ullman and Aller, 1985;Francois, 1987;Luther et al, 1997;Satoh and Imai, 2021).…”

Section: Sediment-water Interactionsmentioning

confidence: 99%

The Marine Iodine Cycle, Past, Present and Future

2024

Frontiers Research Topics

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Frontiers is more than just an open access publisher of scholarly articles: it is a pioneering approach to the world of academia, radically improving the way scholarly research is managed. The grand vision of Frontiers is a world where all people have an equal opportunity to seek, share and generate knowledge. Frontiers provides immediate and permanent online open access to all its publications, but this alone is not enough to realize our grand goals. Frontiers journal seriesThe Frontiers journal series is a multi-tier and interdisciplinary set of openaccess, online journals, promising a paradigm shift from the current review, selection and dissemination processes in academic publishing. All Frontiers journals are driven by researchers for researchers; therefore, they constitute a service to the scholarly community. At the same time, the Frontiers journal series operates on a revolutionary invention, the tiered publishing system, initially addressing specific communities of scholars, and gradually climbing up to broader public understanding, thus serving the interests of the lay society, too. Dedication to qualityEach Frontiers article is a landmark of the highest quality, thanks to genuinely collaborative interactions between authors and review editors, who include some of the world's best academicians. Research must be certified by peers before entering a stream of knowledge that may eventually reach the public -and shape society; therefore, Frontiers only applies the most rigorous and unbiased reviews. Frontiers revolutionizes research publishing by freely delivering the most outstanding research, evaluated with no bias from both the academic and social point of view. By applying the most advanced information technologies, Frontiers is catapulting scholarly publishing into a new generation. What are Frontiers Research Topics?Frontiers Research Topics are very popular trademarks of the Frontiers journals series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area.

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Sintering Bi₂O₃–B₂O₃–ZnO ternary low temperature glass by hydration device to solidify iodine containing silver-coated silica gel

et al. 2021

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A new glass solidification process aims at radioactive iodine waste was explored in order to reduce the possible harm to environment. Samples with different iodine content in silver-coated silica gel were pretreated by hydration device at 300 °C and then sintered at relatively low temperatures (500, 550 and 600 °C). XRD results show that AgI is mainly chemically fixed in the glass network with some AgI particles being physically wrapped by the glass. Moreover, as the sintering temperature reached to 550 °C, B element crystallized. SEM-EDS results show that Ag and I elements are enriched, while the other elements are evenly distributed. AFM results showed that the sample surface becomes rougher as the iodine content increases in the silver coated silica gel. The FT-IR results show that the structure of the sintered sample is mainly composed of [BiO3], [BiO6] and [BO3]. This study provides a new sintering method by hydration device for the treatment of radioactive iodine waste.

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Flux and pathway of iodine dissolution from brackish lake sediment in the northeast of Japan

Cited by 3 publications

References 48 publications

Iodide, iodate & dissolved organic iodine in the temperate coastal ocean

Iodide, iodate & dissolved organic iodine in the temperate coastal ocean

The Marine Iodine Cycle, Past, Present and Future

Sintering Bi₂O₃–B₂O₃–ZnO ternary low temperature glass by hydration device to solidify iodine containing silver-coated silica gel

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Flux and pathway of iodine dissolution from brackish lake sediment in the northeast of Japan

Cited by 3 publications

References 48 publications

Iodide, iodate & dissolved organic iodine in the temperate coastal ocean

Iodide, iodate & dissolved organic iodine in the temperate coastal ocean

The Marine Iodine Cycle, Past, Present and Future

Sintering Bi2O3–B2O3–ZnO ternary low temperature glass by hydration device to solidify iodine containing silver-coated silica gel

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Product

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About

Sintering Bi₂O₃–B₂O₃–ZnO ternary low temperature glass by hydration device to solidify iodine containing silver-coated silica gel