Treatment of ¹³⁷Cs contaminated water by selective adsorption

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• 作者：J.M. Arnal ; M. Sancho ; ^{msanchof@iqn.upv.es} ; B. Garcí ; a-Fayos
• 关键词：Radioactive wastes ; 137Cs ; Adsorption ; Ammonium molybdophosphate
• 刊名：Desalination
• 出版年：2013
• 出版时间：15 July, 2013
• 年：2013
• 卷：321
• 期：Complete
• 页码：22-27
• 全文大小：366 K

文摘

The origin of the radioactive liquid waste object of this work was the incident that occurred in the steel factory of Acerinox in C¨¢diz (Spain) in 1998. In this incident, a ¹³⁷Cs source was accidentally melted generating a significant amount of radioactively contaminated ashes. This research aims to study ash decontamination and declassification as radioactive wastes. After ¹³⁷Cs extraction from ashes by a proper solvent, lixiviate must be treated to remove the radioisotope. One of the suitable processes for ¹³⁷Cs removal from radioactive liquids is adsorption or ionic exchange, using inorganic materials as adsorbents. Among these materials, ammonium molybdophosphate (AMP) is at present the one with higher perspectives of industrial application. This paper aimed to study the application of AMP for ¹³⁷Cs removal from the contaminated liquid extracted from radioactive ashes. The influence of different operating parameters such as pH, AMP concentration and operational time in the adsorption performance is studied. According to the results, the treatment protocol is established.