Speciation of iodine in soils

Yamada, Hidekazu; Kiriyama, Totsuya; Onagawa, Yuji; Hisamori, Ikuko; Miyazaki, Chiho; Yonebayashi, Koyo

doi:10.1080/00380768.1999.10415819

Cited by 53 publications

(39 citation statements)

References 7 publications

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“…The results corresponded to previous observations that the elements are accumulated as organically-bound forms in soil (Yu et al 1996;Yamada et al 1999Yamada et al , 2002Yamaguchi et al 2006Yamaguchi et al , 2010. Concentrations of Br and I in the soil samples from paddy fields were relatively lower than those from upland fields, which would reflect the well known fact that these elements would be leached out under the reducing condition in flooded paddy fields (Yuita et al 1982a(Yuita et al , b, 2005Muramatsu and Yoshida 1993;Yamaguchi et al 2006).…”

supporting

confidence: 78%

Determination of total contents of bromine, iodine and several trace elements in soil by polarizing energy-dispersive X-ray fluorescence spectrometry

Takeda¹,

Yamasaki²,

Tsukada³

et al. 2011

Soil Science and Plant Nutrition

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A non-destructive analysis method for total bromine (Br) and iodine (I) contents in soil was established using polarizing energy-dispersive X-ray fluorescence (EDXRF) spectrometry. The matrix-corrected intensity of Br and I K X-rays from pressed pellets of soil powder samples was calibrated with their contents measured by inductively coupled plasma (ICP)-mass spectrometry after pyrohydrolysis preparation. The calibration curves for Br and I were successfully obtained in the concentration ranges 3.8-223 mg kg À1 and 0.91-54 mg kg À1 respectively. Repeated analyses of the same sample with polarizing EDXRF spectrometry within one day and after approximately 1.5 years showed good reproducibility of the measurement results. The lower limits of detection for Br and I were 0.14 mg kg À1 and 0.34 mg kg À1 respectively. The established analytical method for total Br and I contents in soil is non-destructive, simple and rapid, and is suitable for routine analysis. Trace elements such as rubidium (Rb), strontium (Sr), yttrium (Y), zirconium (Zr), niobium (Nb), cadmium (Cd), tin (Sn), antimony (Sb), caesium (Cs), barium (Ba), light rare earth elements and lead (Pb) were also measurable simultaneously under the identical operational conditions as those for Br and I measurements.

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supporting

confidence: 78%

Determination of total contents of bromine, iodine and several trace elements in soil by polarizing energy-dispersive X-ray fluorescence spectrometry

Takeda¹,

Yamasaki²,

Tsukada³

et al. 2011

Soil Science and Plant Nutrition

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“…Soil iodine was extracted by shaking a mixture of 1 g of soil and 10 mL of 5% TMAH solution for 4 h at room temperature (Yamada et al 1999). The extract solution was separated from the soil by centrifugation (ca.…”

Section: Methodsmentioning

confidence: 99%

“…A method for quantitative speciation of iodine in soil was proposed in a previous paper (Yamada et al 1999). By the application of the method proposed, iodine in soil was divided into four fractions: organic iodine bound to humic acid, organic iodine bound to fulvic acid, iodate (I03 -), and iodide (n. Moreover, it was found that a large proportion of iodine in soil occurred in the organically bound form such as organic iodine bound to humic and fulvic acids.…”

Section: Identification Of Organically Bound Iodine In Soil Humicmentioning

confidence: 99%

“…Inorganic iodine (iodide and iodate) in soil was extracted together with soil humic substances by TMAH and was included into the fulvic acid fraction in the form of iodide ion after the precipitation of humic acid in the presence of ascorbic acid (as an agent for the reduction of iodate into iodide) (Yamada et al 1999). Therefore, AS was assigned to inorganic iodine contained in soil.…”

Section: Iodine In Fulvic Acid Fractionmentioning

confidence: 99%

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Identification of organically bound iodine in soil humic substances by size exclusion chromatography / inductively coupled plasma mass spectrometry (SEC / ICP-MS)

Yamada

Hisamori

Yonebayashi

2002

Soil Science and Plant Nutrition

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“…4 mL of 5% tetra-methyl ammonium hydroxide (TMAH) solution was added to 0.5-1g of powdered sample in a Teflon vessel for the microwave digestion [7][8][9] . The power level and time for each digestion stage were programmed to reach a maximum value of 800 W over 15 minutes, and held there for an additional 10 minutes.…”

Section: Introductionmentioning

confidence: 99%

Distribution of 99Tc and 129I in the vicinity of underground nuclear tests at the Nevada Test Site

Zhao

Rose

et al. 2008

J Radioanal Nucl Chem

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99 Tc and 129 I are important contributors to risk assessment due to their long halflives and high mobility as aqueous anionic species. We analyzed 99 Tc and 129 I in groundwater samples in and near 11 underground nuclear tests and in melt glass and rock samples retrieved from the Chancellor test cavity, Nevada Test Site. The 129 I/ 127 I ratio ranges from 10 -3 to 10 -6 in cavity water and 10 -4 to 10 -9 in satellite wells. The 99 Tc concentration ranges from 3 to 10 -4 Bq/L in cavity waters and from 0.3 to 10 -4 Bq/L in satellite wells. Downstream migration is apparent for both radionuclides. However, it is affected by both retardation and initial distribution. In-situ 99 Tc and 129 I K d s calculated using rubble and water concentrations are 3 to 22 mL/g and 0 to 0.12 mL/g, respectively and are suggestive of mildly reducing conditions. 129 I distribution in the melt glass, rubble and groundwater of the Chancellor test cavity is 28%, 24% and 48%, respectively; for 99 Tc, it is 65%, 35% and 0.3%, respectively. Our partitioning estimates differ from those of underground tests in French Polynesia, implying that fission product distribution may vary from test to test. Factors that may influence this distribution include geologic conditions (e.g. lithology, water and CO 2 content) and the cooling history of the test cavity.

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Speciation of iodine in soils

Cited by 53 publications

References 7 publications

Determination of total contents of bromine, iodine and several trace elements in soil by polarizing energy-dispersive X-ray fluorescence spectrometry

Determination of total contents of bromine, iodine and several trace elements in soil by polarizing energy-dispersive X-ray fluorescence spectrometry

Identification of organically bound iodine in soil humic substances by size exclusion chromatography / inductively coupled plasma mass spectrometry (SEC / ICP-MS)

Distribution of 99Tc and 129I in the vicinity of underground nuclear tests at the Nevada Test Site

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