Sorption and speciation of iodine in boreal forest soil

Söderlund, Mervi; Virkanen, Juhani; Aromaa, Hanna; Gracheva, Nadezda; Lehto, Jukka

doi:10.1007/s10967-016-5022-z

Cited by 17 publications

(8 citation statements)

References 67 publications

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“…For example, in the area of Olkiluoto Nuclear Power Plant (Japan) in the organic part of the soil (humus), selenium is present at a level of 34 mg/kg. In mineral soil, regardless of its depth, the content level of this element fluctuates ~14 mg/kg [14,15].…”

Section: Occurrence Of Selenium In the Environmentmentioning

confidence: 99%

Selenium–Fascinating Microelement, Properties and Sources in Food

2019

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Selenium is a micronutrient that is essential for the proper functioning of all organisms. Studies on the functions of selenium are rapidly developing. This element is a cofactor of many enzymes, for example, glutathione peroxidase or thioredoxin reductase. Insufficient supplementation of this element results in the increased risk of developing many chronic degenerative diseases. Selenium is important for the protection against oxidative stress, demonstrating the highest activity as a free radical scavenger and anti-cancer agent. In food, it is present in organic forms, as exemplified by selenomethionine and selenocysteine. In dietary supplementation, the inorganic forms of selenium (selenite and selenate) are used. Organic compounds are more easily absorbed by human organisms in comparison with inorganic compounds. Currently, selenium is considered an essential trace element of fundamental importance for human health. Extreme selenium deficiencies are widespread among people all over the world. Therefore, it is essential to supplement the deficiency of this micronutrient with selenium-enriched food or yeast cell biomass in the diet.

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Section: Occurrence Of Selenium In the Environmentmentioning

confidence: 99%

Selenium–Fascinating Microelement, Properties and Sources in Food

2019

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“…Furthermore, the soils are predominantly sandy with low organic carbon concentrations, which limits the ability of the soils to retain I (Johnson, 2003;Johnson et al, 2003;Köhler et al, 2019;Mohiuddin et al, 2019;Watts & Mitchell, 2009;Watts et al, 2019). The alkaline nature of the soils would also limit I retention; adsorption of I onto Fe and Al oxyhydroxides and rates of conversion to humus-bound I, are both lower under alkaline conditions (Johnson et al, 2003;Shetaya et al, 2012;Söderlund et al, 2017;Wang et al, 2019;Watts & Mitchell, 2009). Principal component analysis (PC1 and PC2) revealed that various soil characteristics, especially those related to soil texture, accounted for 60% variation in soil I concentration (Fig.…”

Section: Iodine In Soilmentioning

confidence: 99%

Multiple geochemical factors may cause iodine and selenium deficiency in Gilgit-Baltistan, Pakistan

Shariati

Bailey

Arshad

et al. 2021

Environ Geochem Health

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Deficiencies of the micronutrients iodine and selenium are particularly prevalent where populations consume local agricultural produce grown on soils with low iodine and selenium availability. This study focussed on such an area, Gilgit-Baltistan in Pakistan, through a geochemical survey of iodine and selenium fractionation and speciation in irrigation water and arable soil. Iodine and selenium concentrations in water ranged from 0.01–1.79 µg L−1 to 0.016–2.09 µg L−1, respectively, which are smaller than levels reported in similar mountainous areas in other parts of the world. Iodate and selenate were the dominant inorganic species in all water samples. Average concentrations of iodine and selenium in soil were 685 µg kg−1 and 209 µg kg−1, respectively, much lower than global averages of 2600 and 400 µg kg−1, respectively. The ‘reactive’ fractions (‘soluble’ and ‘adsorbed’) of iodine and selenium accounted for < 7% and < 5% of their total concentrations in soil. More than 90% of reactive iodine was organic; iodide was the main inorganic species. By contrast, 66.9 and 39.7% of ‘soluble’ and ‘adsorbed’ selenium, respectively, were present as organic species; inorganic selenium was mainly selenite. Very low distribution coefficients (kd = adsorbed/soluble; L kg−1) for iodine (1.07) and selenium (1.27) suggested minimal buffering of available iodine and selenium against leaching losses and plant uptake. These geochemical characteristics suggest low availability of iodine and selenium in Gilgit-Baltistan, which may be reflected in locally grown crops. However, further investigation is required to ascertain the status of iodine and selenium in the Gilgit-Baltistan food supply and population.

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“…In macro-concentrations, the speciation of iodine can be measured conventionally with a combination of chromatographic techniques (i.e. IC, LC or HPLC) and an appropriate detector, such as ICP-MS (inductively coupled plasma mass spectrometry) [10][11][12][13][14][15]. With radioactive samples, the availability of special instruments might be limited because of safety aspects.…”

Section: Introductionmentioning

confidence: 99%

A simple method for quantifying iodate and iodide fractions in solution using Ag+-impregnated activated carbon

Suorsa

Otaki

Zhang

et al. 2020

J Radioanal Nucl Chem

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The speciation of iodine in environment must be known in order to properly assess its geological fate and to study potential remediation materials for the decontamination of water containing radioactive iodine. In this study, the utilization of silver-impregnated granular activated carbon for separation between two iodine species, iodate and iodide, from each other was studied in different solution matrices with batch and column experiments. A high separation of the iodine species was achieved in the high concentrations of interfering ions, e.g. chloride, and in both μM and trace iodine concentrations. The method is suitable for both radioactive and non-radioactive iodine.

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Sorption and speciation of iodine in boreal forest soil

Cited by 17 publications

References 67 publications

Selenium–Fascinating Microelement, Properties and Sources in Food

Selenium–Fascinating Microelement, Properties and Sources in Food

Multiple geochemical factors may cause iodine and selenium deficiency in Gilgit-Baltistan, Pakistan

A simple method for quantifying iodate and iodide fractions in solution using Ag+-impregnated activated carbon

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