Iodine, bromine and chlorine contents in solls and plants of Japan

Yuita, Kouichi; Nobusawa, Yumiko; Shibuya, Masao; Aso, Shotaro

doi:10.1080/00380768.1982.10433648

Cited by 32 publications

(12 citation statements)

References 19 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). The concentrations of Br and I in the samples measured by the ICP-MS were compared with their relative X-ray intensities by polarizing EDXRF spectrometry ( Fig.…”

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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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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“…In the Gray Lowland soils from the middle reaches of the Miomote River, a low iodine content of 0.61 mg kg-' was recorded in the Ap horizon (0-0.16 m), which was an eluvial horizon. On the other hand, in the subsoil horizon (0.27-0.50 m), which was an illuvial horizon, the iodine content was 11.0 mg kg-I, a value 18 times higher than that in the Ap horizon (Yuita et al 1982b).…”

Section: Iodine Content In the Uppermost Soil Horizonsmentioning

confidence: 99%

Behavior of Iodine in a Forest Plot, an Upland Field, and a Paddy Field in the Upland Area of Tsukuba, Japan: Vertical Distribution of Iodine in Soil Horizons and Layers to a Depth of 50 m

Yuita

Kihou

2005

Soil Science and Plant Nutrition

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In the course of a series of studies conducted to investigate the long‐term behavior of 129I (which has a half‐life of 16 million years) in the environment, the vertical distribution of stable iodine (127I) in the soil horizons and layers to a depth of 50 m was determined in a forest plot, an upland field, and a paddy field in the upland area of Tsukuba, Japan. The iodine content was strongly controlled by the groundwater level and by the oxidation‐reduction conditions of the soil horizons/layers. In the forest plot and the upland field, the iodine content was the highest in the oxidative surface horizons (0–0.3 m), ranging from 42 to 71 mg kg−1. The iodine content decreased with increasing depth, falling sharply at depths below the mean water table (depth of about 2.5 m) to a low value of around 0.1 mg kg−1 at the lowest depth of the Joso Clay layer (first aquiclude) (depth of about 5.0 m). In the paddy field, the surface Apg horizon (0–0.18 m) showed a low iodine content of 2.8 mg kg−1, with eluviation of iodine under strongly reductive conditions. The mildly oxidative 2Bw horizon (0.60–0.89 m) showed the highest iodine content (12.0 mg kg−1) among the horizons in the paddy field, with illuviation of iodine. At depths below the mean water table during the non‐irrigation period (depth of about 1.25 m), the iodine content decreased with increasing depth to a low value of 0.09 mg kg−1 at the lowest depth of the Joso Clay layer (depth of about 4.3 m), as in the forest plot and the upland field. Below the Joso Clay layer, the iodine content at all the sites was, without exception, lower than that in the corresponding vadose oxidative layers. The upper layers of the Narita Formation (second aquiclude) at all the sites showed the highest iodine content (0.5–5.0 mg kg−1) below the Joso Clay layer, but these values were almost the same or lower than those of the reductive surface horizons (0–0.6 m) in the paddy field. In another layers, the iodine content ranged from 0.01 to 1.0 mg kg−1, the lowest content recorded to a depth of 50 m at all the sites.

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“…These results indicated that added radioiodine was associated on the surface of sesquioxides of Fe and Al, noncrystalline silicates such as allophene, organic materials and complexes of metals with humus. Stable iodine concentrations in Andosol are known to be higher than other soils [9,14]. This should be related to the high sorption capacity of Andosol for iodine.…”

Section: Sorption and Desorption Phenomena Of Iodine In Soilmentioning

confidence: 99%

Behavior of iodine in the soil-plant system

Muramatsu¹,

Yoshida²,

Ban-Nai³

et al. 2002

Radioprotection

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In order to understand the behaviour of radioactive and stable iodine in the environment, we have carried out radiotracer experiments and chemical analyses in the soil-plant systems. Parameters important for the assessment of radioiodine movement from the environment to man, e.g. soil-plant transfer factors for various agricultural crops and soil-solution distribution coefficient for different soils, were obtained. Mechanisms of iodine sorption and desorption on soil were also studied. Microorganisms and/or their products (e.g. enzymes) were found to play an important role in the fixation of iodine on soil. Iodine was observed to be desorbed from the flooded soils due to the reducing conditions (low Eh) created by the microbial activities. From the soil-rice plant system biogenesis methyl iodide was found to be evaporated into the atmosphere. Through experiment using 1Z3 I tracer, we found that volatile organic iodine was produced due to microbial activities (including bacterial activities).

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Iodine, bromine and chlorine contents in solls and plants of Japan

Cited by 32 publications

References 19 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

Behavior of Iodine in a Forest Plot, an Upland Field, and a Paddy Field in the Upland Area of Tsukuba, Japan: Vertical Distribution of Iodine in Soil Horizons and Layers to a Depth of 50 m

Behavior of iodine in the soil-plant system

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