Cesium adsorption/desorption behavior of clay minerals considering actual contamination conditions in Fukushima
書誌事項
- 公開日
- 2016-02-12
- 資源種別
- journal article
- 権利情報
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- https://creativecommons.org/licenses/by/4.0
- https://creativecommons.org/licenses/by/4.0
- DOI
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- 10.1038/srep21543
- 公開者
- Springer Science and Business Media LLC
説明
<jats:title>Abstract</jats:title><jats:p>Cesium adsorption/desorption experiments for various clay minerals, considering actual contamination conditions in Fukushima, were conducted using the <jats:sup>137</jats:sup>Cs radioisotope and an autoradiography using imaging plates (IPs). A 50 μl solution containing 0.185 ~ 1.85 Bq of <jats:sup>137</jats:sup>Cs (10<jats:sup>−11</jats:sup> ~ 10<jats:sup>−9 </jats:sup>molL<jats:sup>−1</jats:sup> of <jats:sup>137</jats:sup>Cs) was dropped onto a substrate where various mineral particles were arranged. It was found that partially-vermiculitized biotite, which is termed “weathered biotite” (WB) in this study, from Fukushima sorbed <jats:sup>137</jats:sup>Cs far more than the other clay minerals (fresh biotite, illite, smectite, kaolinite, halloysite, allophane, imogolite) on the same substrate. When WB was absent on the substrate, the amount of <jats:sup>137</jats:sup>Cs sorbed to the other clay minerals was considerably increased, implying that selective sorption to WB caused depletion of radiocesium in the solution and less sorption to the coexisting minerals. Cs-sorption to WB continued for about one day, whereas that to ferruginous smectite was completed within one hour. The sorbed <jats:sup>137</jats:sup>Cs in WB was hardly leached with hydrochloric acid at pH 1, particularly in samples with a longer sorption time. The presence/absence of WB sorbing radiocesium is a key factor affecting the dynamics and fate of radiocesium in Fukushima.</jats:p>
収録刊行物
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- Scientific Reports
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Scientific Reports 6 (1), 21543-, 2016-02-12
Springer Science and Business Media LLC
