Continuous circulation system for cesium separation in acid waste liquid

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Abstract Aiming at the separation and enrichment of Cs⁺ in the radioactive waste liquid produced by the process of recovering U and Pu in nuclear industry, a continuous electrodialysis enrichment and separation technology(CEEST) was designed. A series of Na[Co₉-POM] materials were synthesized by a hydrothermal method at different temperatures, meanwhile the materials were characterized by SEM, XRD and other methods. The products' Cs⁺ separation ability were evaluated. The effects of different constant current, pH of solution and the presence of coexisting ions on the Cs⁺ separation process were studied. The Na[Co₉-POM]-120 showed the best Cs⁺ separation and recovery ability. More than 96% of Cs⁺ could be separated and collected in highly acid condition(pH < 1) under 0.03 A current in about 150 min. The presence of coexisting ions had little effect on the separation of the Cs⁺. Therefore, a comprehensive continuous circulation system for Cs⁺ separation was proposed, which successfully achieved the separation of the Cs⁺ in acid radioactive waste liquid and its application advantages in industry were analyzed.

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	LYU Huiyun
	ZHAO Jingyu
	JIAO Han
	NA Ping

Keywords： cesium electrodialysis high acid separation polyoxmetalate

Received 2021-03-31;

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LYU Huiyun, ZHAO Jingyu, JIAO Han, NA Ping.Continuous circulation system for cesium separation in acid waste liquid[J] Chemcial Industry and Engineering, 2022,V39(4): 39-49

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