Effectiveness of non-exchangeable potassium quantified by mild tetraphenyl‑boron extraction in estimating radiocesium transfer to soybean in Fukushima

Wakabayashi, Shokichi; Eguchi, Tetsuya; Nakao, Atsushi; Azuma, Kazuki; Fujimura, Shigefumi; Kubo, Katashi; Saito, Masaaki; Matsunami, Hisaya; Yanai, Junta

doi:10.1016/j.scitotenv.2022.153119

Cited by 7 publications

(1 citation statement)

References 40 publications

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“…Nex-K could be used as a good proxy of K phytoavailable fraction especially in mica-rich soil [Mengel andRahmatullah, 1994, Surapaneni et al, 2002]. Kurokawa et al [2020] and Wakabayashi et al [2022] reported that the Nex-K reduced RCs crop migration as well as that of exchangeable K (Ex-K). The Nex-K content of the FS and DS samples was determined by subtracting Ex-K from the estimation of K concentration determined as the elemental content extracted with the hot nitric acid method [Helmke and Sparks, 1996].…”

Section: Non-exchangeable K As An Indicator Of Acidextractable Kmentioning

confidence: 99%

Impact of radiocesium contamination in flood sediment deposited after the 2019 typhoon on decontaminated fields of Fukushima Prefecture, Japan

Asano¹,

Harada²,

Nakao³

et al. 2022

Comptes Rendus. Géoscience

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Sediment that has deposited after the flood generated by the 2019 typhoon (referred to as Flood Sediment, FS) was collected along two rivers in eastern Fukushima Prefecture, Japan to determine the total and exchangeable radiocesium ( 137 Cs), and acid-extractable potassium (K) contents. Then, these FS parameters were compared with those of decontaminated soils (DS) in nearby agricultural fields to discuss the potential transfer risk of 137 Cs from rivers to nearby remediated soils. While FS had about four times higher total 137 Cs content, it showed a three-times lower exchangeable 137 Cs content than DS. Furthermore, acid-extractable K referred to as non-exchangeable K (Nex-K) content was high enough to restrict 137 Cs transfer from soil to crops for both FS and DS. From these comparisons, we concluded that deposition of FS onto DS may not increase the transfer of 137 Cs from soil to crops.

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Section: Non-exchangeable K As An Indicator Of Acidextractable Kmentioning

confidence: 99%

Impact of radiocesium contamination in flood sediment deposited after the 2019 typhoon on decontaminated fields of Fukushima Prefecture, Japan

Asano¹,

Harada²,

Nakao³

et al. 2022

Comptes Rendus. Géoscience

Self Cite

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Examination of the reliability of X‐ray powder diffraction analysis to determine mineral composition of soils

Kurokawa,

Azuma,

Nakao

et al. 2024

Soil Science Soc of Amer J

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X‐ray powder diffraction (XRPD) is an effective technique for identifying and quantifying mineral types in soil. However, few studies have compared quantitative values based on XRPD with those from conventional wet chemical methods (WCMs). Here, we determined the primary mineral content in artificial mineral mixtures and 79 agricultural soils from across Japan using WCMs and two XRPD‐based quantitative methods: the mineral intensity factor (MIF) and the full‐pattern summation (FPS) methods performed with the powdR package for R. For artificial mixtures, the accuracy of mineral content determination (i.e., micas, quartz, K‐feldspar, and plagioclase) followed the order: WCMs > FPS > MIF. For Japanese agricultural soils, the contents of each mineral were highly similar between WCMs and FPS, based on mean absolute differences and correlation coefficients. Alternatively, MIF displayed lower similarities with WCMs, likely due to preferred orientation and peak shift or overlap issues. Using the FPS method, the mica and amorphous phase contents were positively and significantly correlated with nonexchangeable K content and cation exchange capacity, respectively. Additionally, the plagioclase content was negatively and significantly correlated with clay content. Thus, the powdR‐based FPS method is recommended for determining the mineral composition of soils, as it allows for a clearer and more quantitative demonstration of the relationship between individual minerals and soil properties.

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Influence of fluorine content of potassium trioctahedral micas on plant availability of interlayer potassium and effectiveness to reduce radiocesium uptake by paddy rice

Eguchi

Matsunami

Fujimura

et al. 2023

Applied Clay Science

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Effectiveness of non-exchangeable potassium quantified by mild tetraphenyl‑boron extraction in estimating radiocesium transfer to soybean in Fukushima

Cited by 7 publications

References 40 publications

Impact of radiocesium contamination in flood sediment deposited after the 2019 typhoon on decontaminated fields of Fukushima Prefecture, Japan

Impact of radiocesium contamination in flood sediment deposited after the 2019 typhoon on decontaminated fields of Fukushima Prefecture, Japan

Examination of the reliability of X‐ray powder diffraction analysis to determine mineral composition of soils

Influence of fluorine content of potassium trioctahedral micas on plant availability of interlayer potassium and effectiveness to reduce radiocesium uptake by paddy rice

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