Speciation of Cesium isotopesin river water: A case study in the Ukedo River
Speciation of Cesium isotopesin river water: A case study in the Ukedo River
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河水中铯同位素的形态：以 Ukedo 河为例
DOI：
10.1093/rpd/ncac056
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发表时间：
2022
影响因子：
1
通讯作者：
Naofumi Akata
中科院分区：
文献类型：
--
作者：
Hirofumi Tazoe;Ryo Tachizaki;Yuto Tomisaka;Haruka Kuwata;Naofumi Akata
河流系统中的 137C 可以被水生动物吸收。本文测定了 Ukedo 河水系中总 137 Cs 浓度以及河水样品中溶解、酸溶和不溶部分中 137 Cs 的存在情况。 2012年5月，大垣坝以下总137Cs浓度达到最大值2.08 Bq kg−1。在基流条件下，>87%的137Cs以溶解状态存在，酸溶态和不溶态分别<13%和不可检测水平。大雨过后，颗粒物比例（酸溶态+不溶态）上升至65%，相当于基流条件下的两倍。颗粒 137C，尤其是酸溶性 C，进入水生生态系统的食物链后可以发挥作用。
137Cs in river systems can be taken up by aquatic animals. In this paper, total137Cs concentration in the Ukedo River system and137Cs presence in dissolved, acid-soluble and -insoluble fractions in river water samples were determined. Total137Cs concentration had the maximum value of 2.08 Bq kg−1below the Ogaki Dam in May 2012. In the base flow condition, > 87% of137Cs existed in the dissolved state, and the acid-soluble state and the insoluble state were <13% and the undetectable level, respectively. After the heavy rain event, the particulate fraction (acid-soluble state + insoluble state) was elevated to 65%, which corresponds to twice as much as that in the base flow condition. Particulate137Cs, especially the acid-soluble Cs, can play a role when taken into the food chain in aquatic ecosystems.