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DOI : 10.17640/KSWST.2021.29.1.25 ,    Vol.29, No.1, 25 ~ 32, 2021
A Study on the Production and Characteristics of Surface-treated Carbonyl Iron (CI) for Cesium Removal from Water
김형준 Hyoung Jun Kim , 정호진 Ho Jin Chung
A previously-developed complex of K3[Fe(CN)6] and FeCl3 is a blue-coloured dye known for its effectiveness in removing cesium from the water. However, despite its superior cesium adsorption capacity and high disposal effectiveness, the powdered complex of K3[Fe(CN)6] and FeCl3 also dissolves under water, which makes it difficult to isolate and recover, and as such it accumulates in the hydrosphere, possibly leading to secondary environmental problems. Therefore, in this study, we produce and apply a new adsorbent to the cesium disposal in order to overcome the problems of the powdered complex of K3[Fe(CN)6] and FeCl3. Carbonyl iron, a ferromagnetic substance produced in the manufacturing of pentacarbonyl iron, was selected as the main ingredient of the new compound. The compound is produced through a process of oxidation of its surface with a particle of CI, and a process of silane treatment with the complex of K3[Fe(CN)6] and FeCl3. An X-Ray Diffractometer (XRD) analysis of the surface of the produced compound confirmed its surface being uniformly coated with the complex of K3[Fe(CN)6] and FeCl3. A batch experiment conducted in order to evaluate cesium disposal capability of the compound granted it a high cesium removal efficiency of 99.5%. With a distribution coefficient value of 113,136 mL/g, the compound can be classified as a high quality absorbent. We believe that the new adsorbent developed in this study can be applied as an economical and environment-friendly viable alternative that can be used to dispose of cesium from the water safely and completely.
Key Words
Activation carbonyl iron, ACI, Carbonyl iron, CI, Cesium, Ferromagnetic substance, Oxidation carbonyl iron, OCI, Prussian blue 활성 카복실 아이온, ACI, 카복실 아이온, CI, 세슘, 강자성체, 산화 카복실 아이온, OCI, 프루시안 블루
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