Redox reaction of iodine in paddy soil investigated by field observation and the I K-Edge XANES fingerprinting method

Yamaguchi, Noriko; Nakano, Masashi; Tanida, Hajime; Fujiwara, Hideshi; Kihou, Nobuharu

doi:10.1016/j.jenvrad.2005.09.001

Cited by 42 publications

(33 citation statements)

References 28 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: 91%

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: 91%

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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“…These can lead to transformations between I -and IO 3 − or the production of I 2 (Vinogradov and Lapp 1977;Fuge and Johnson 1986;Johnson 2003;Fuge 2013). Importantly, under aerobic conditions (in upland fields), humic acids are involved in the reduction of iodate (IO 3 − ) to molecular iodine, which can further volatilise or interact with soil organic matter (SOM) to create organo-iodine compounds (Yamaguchi et al 2005(Yamaguchi et al , 2006.…”

Section: Introductionmentioning

confidence: 99%

The role of exogenous humic and fulvic acids in iodine biofortification in spinach (Spinacia oleracea L.)

2015

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Background and aims The strong sorption of iodine in soils is a major factor that limits its uptake by plants. The aim of this study was to evaluate the influence of Humistar (a concentrate of exogenous humic acids 12 % w/w and fulvic acids 3 % w/w; abbreviated: HU) applied with KI or KIO 3 on the efficiency of iodine biofortification, yield and the accumulation of undesirable compounds in spinach. Methods Methods of iodine application with or without HU were tested in two pot experiments and a hydroponic study with spinach cultivation. The spinach biomass and the content of iodine, soluble oxalates, Cd and Pb in leaves were determined. The physicochemical properties and chemical composition of the soil and media were analysed. ResultsNo negative influence of iodine and HU on spinach yield was observed. Fertigation with iodine resulted in a higher efficiency of iodine biofortification than its application pre-sowing (particularly for KIO 3 ), with no increase in the Cd and Pb content in spinach plants compared to the control. Conclusion The improvement of iodine uptake and root-to-leaf transfer (represented by higher transfer factor values) in spinach can be obtained by the application of HU via plant fertigation with IO 3 − . The level of soluble oxalates in spinach grown in the pot experiments was not affected.

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“…Van Loon et al (2003a,b) and Glaus et al (2008) studied diffusion of iodide and iodate through Opalinus Clay, which is under investigation as a potential host rock for a high-level radioactive waste repository in Switzerland. Um and Serne (2005) performed a series of batch sorption and column experiments to investigate sorption and transport behavior of 99 Tc, 129 I, 79 Se, and 90 Sr on and through borehole sediments collected at the Hanford Site in the U.S. Major chemical forms of iodine in soil include iodide (I − ), iodate (IO 3 − ), and organically bound iodine (Yamada et al, 1999(Yamada et al, , 2002Yuita, 1992;Yamaguchi et al, 2006;Shimamoto and Takahashi, 2008), and the environmental behavior of iodine can be different among these species. In earlier research, Hu et al (2005) conducted integrated column and batch experiments to investigate the inter-conversion, sorption and transport of various iodine species (iodide, iodate, and 4-iodoaniline).…”

Section: Introductionmentioning

confidence: 99%

Soil column experiments for iodate and iodide using K-edge XANES and HPLC–ICP-MS

Shimamoto

Itai

Takahashi

2010

Journal of Geochemical Exploration

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Redox reaction of iodine in paddy soil investigated by field observation and the I K-Edge XANES fingerprinting method

Cited by 42 publications

References 28 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

The role of exogenous humic and fulvic acids in iodine biofortification in spinach (Spinacia oleracea L.)

Soil column experiments for iodate and iodide using K-edge XANES and HPLC–ICP-MS

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