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首页> 外文期刊>Environment and Ecology Research >Determination of Cesium Adsorption Breakthrough Curves Using Carbonized Rice Hull and Beech Sawdust as Adsorbents
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Determination of Cesium Adsorption Breakthrough Curves Using Carbonized Rice Hull and Beech Sawdust as Adsorbents

机译：碳化稻壳和山毛榉木屑作为吸附剂测定铯的吸收突破曲线

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摘要

To determine the adsorption breakthrough curves of carbonized rice hull and beech sawdust, which were selected as candidate natural materials for Cesium (Cs) adsorption in our previous study, fixed-bed adsorption experiments were conducted. These experiments were performed using a glass column with a continuous flow system and a variable packed-bed height of the above materials. For carbonized rice hull, the breakthrough point appeared relatively early, although a long adsorption time was required to reach the end point. In addition, for beech sawdust, the maximum Cs concentration at the column outlet was approximately 1.2 times that at the inlet. Regarding the Cs mass balance in the packed-bed layer, the amount of Cs adsorbed per unit weight of adsorbent was greater for carbonized rice hull than for beech sawdust. Furthermore, the adsorption ratio in the packed-bed was higher for beech sawdust than for carbonized rice hull. However, following estimation of the length of the adsorption zone formed in the packed bed using the model formula commonly employed in the design of the fixed-bed adsorption apparatus, it was not possible to calculate the real length of the adsorption zone.
机译：为了确定碳化稻壳和山毛榉木屑的吸附突破曲线，我们在先前的研究中选择了它们作为铯（Cs）吸附的候选天然材料，进行了固定床吸附实验。使用具有连续流动系统和上述材料的可变填充床高度的玻璃柱进行这些实验。对于碳化稻壳，突破点出现的相对较早，尽管达到终点需要很长的吸附时间。此外，对于山毛榉木屑，色谱柱出口处的最大Cs浓度约为入口处的1.2倍。关于填充床层中的Cs质量平衡，碳化稻壳的每单位重量吸附剂的Cs吸附量大于山毛榉木屑。此外，山毛榉木屑比碳化稻壳的填充床吸附率更高。然而，在使用固定床吸附装置的设计中通常使用的模型公式估算填充床中形成的吸附区的长度之后，不可能计算出吸附区的实际长度。

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