Radiocesium was deposited on the soils of Fukushima Prefecture in Japan after the meltdown of the Fukushima Daiichi Nuclear Power Plant in 2011. The radiocesium bound to 2:1 clay minerals, such as vermiculite, common in the soil of that region and became non-exchangeable due to the strong affinity of these clay minerals for the Cs⁺ adsorbed. The current study generated adsorption envelopes for Cs⁺ on three zeolite minerals: zeolite Y, ZSM-5, and ferrierite. Two of these (ZSM-5 and ferrierite) caused monovalent cations to adsorb via a strong inner-sphere mechanism. A comparison of Cs⁺ adsorption on these zeolites to Na⁺ adsorption on the same zeolites showed that Cs⁺ adsorbs much more strongly than Na⁺, which is explained by its atomic properties. Despite the inner-sphere adsorption of Cs⁺ on ZSM-5 and ferrierite, the affinity of vermiculite for Cs⁺ is even stronger. An adsorption envelope for Cs⁺ on vermiculite failed to show a low-pH adsorption edge even at a pH of 1.01, with adsorption remaining at ~65% of the maximum even at this low pH. The adsorption envelopes for Cs⁺ on ZSM-5 and ferrierite minerals did show low-pH adsorption edges centered at pH 3.5 and 3.0, respectively, where Cs⁺ adsorption dropped to zero. The greater affinity of vermiculite for Cs⁺, even when compared with that for two zeolite minerals known to have significant affinities for monovalent ions, highlights the difficulty in removing Cs⁺ from contaminated Fukushima soils.

2011 年福岛第一核电站发生熔毁后，放射性铯沉积在日本福岛县的土壤上。放射性铯与该地区土壤中常见的 2:1 粘土矿物（如蛭石）结合，变得不可交换由于这些粘土矿物对吸附的 Cs ⁺有很强的亲和力。目前的研究在三种沸石矿物上产生了 Cs ^{+ 的}吸附包络：沸石 Y、ZSM-5 和镁碱沸石。其中两个（ZSM-5 和镁碱沸石）通过强大的内球机制导致单价阳离子吸附。CS的比较⁺吸附于这些沸石对Na ⁺吸附在相同的沸石表明，铯⁺吸附强烈得多比的Na⁺，这是由其原子特性解释的。尽管 Cs ⁺在 ZSM-5 和镁碱沸石上的内球吸附，蛭石对 Cs ⁺的亲和力更强。即使在 1.01 的 pH 值下，蛭石上Cs ⁺的吸附包络也未能显示出低 pH 值吸附边缘，即使在这种低 pH 值下，吸附仍保持在最大值的 65% 左右。ZSM-5 和镁碱沸石矿物上Cs ⁺的吸附包络确实显示出分别以 pH 3.5 和 3.0 为中心的低 pH 吸附边缘，其中 Cs ⁺吸附降至零。蛭石为Cs中更大的亲和力⁺，即使与已知对一价离子具有显着亲和力的两种沸石矿物相比，也凸显了从受污染的福岛土壤中去除 Cs ⁺的难度。