Weathering promotes the sorption of radiocesium in mafic minerals of river sediments in the Fukushima Prefecture, Japan

IF 3.1 3区地球科学 Q1 GEOCHEMISTRY & GEOPHYSICS

Applied Geochemistry Pub Date : 2025-07-08 DOI:10.1016/j.apgeochem.2025.106490

Hiroki Hagiwara , Yusuke Watanabe , Hiromi Konishi , Hironori Funaki , Kenso Fujiwara , Kazuki Iijima

引用次数: 0

Abstract

Radiocesium (¹³⁴Cs and ¹³⁷Cs) was sorbed on minerals and transported to river systems due to the Fukushima Daiichi Nuclear Power Plant accident. Recently, the authors have reported that mafic minerals sorb ¹³⁷Cs equally or more strongly than micaceous minerals in fine sands. We characterized mafic minerals and elucidated their weathering using electron microscopy to determine whether they can sorb ¹³⁷Cs. The surface of hornblende particles is weathered and altered to vermiculite. The surface of micas is less weathered than that of hornblende, indicating the ¹³⁷Cs activity concentrations of highly weathered mafic minerals are higher than those of micas in part of sampling site. The results indicate that the effects of ¹³⁷Cs sorption for hornblende depend on the weathering product at the surface.

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风化作用促进了日本福岛县河流沉积物中镁基矿物对放射性铯的吸收

由于福岛第一核电站事故，放射性铯（134Cs和137Cs）被矿物吸收并输送到河流系统。最近，作者报道了在细砂中基性矿物与云母矿物一样或更强地吸收137Cs。我们对基性矿物进行了表征，并利用电子显微镜分析了它们的风化作用，以确定它们是否能吸收137Cs。角闪石颗粒表面风化蚀变为蛭石。云母表面风化程度低于角闪石，说明部分采样点强风化基性矿物的137Cs活性浓度高于云母。结果表明，角闪石吸附137Cs的效果与表面风化产物有关。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Geochemistry 地学-地球化学与地球物理

CiteScore

6.10

自引率

8.80%

发文量

272

审稿时长

65 days

期刊介绍： Applied Geochemistry is an international journal devoted to publication of original research papers, rapid research communications and selected review papers in geochemistry and urban geochemistry which have some practical application to an aspect of human endeavour, such as the preservation of the environment, health, waste disposal and the search for resources. Papers on applications of inorganic, organic and isotope geochemistry and geochemical processes are therefore welcome provided they meet the main criterion. Spatial and temporal monitoring case studies are only of interest to our international readership if they present new ideas of broad application. Topics covered include: (1) Environmental geochemistry (including natural and anthropogenic aspects, and protection and remediation strategies); (2) Hydrogeochemistry (surface and groundwater); (3) Medical (urban) geochemistry; (4) The search for energy resources (in particular unconventional oil and gas or emerging metal resources); (5) Energy exploitation (in particular geothermal energy and CCS); (6) Upgrading of energy and mineral resources where there is a direct geochemical application; and (7) Waste disposal, including nuclear waste disposal.