Removal of radioactive cesium from solutions by zinc ferrocyanide

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• 作者：Bing LI ; Jiali LIAO ; Jiaojiao WU ; Dong ZHANG ; Jun ZHAO ; Yuanyou YANG ; Qiong CHENG ; Yue FENG ; Ning LIU
• 关键词：Zinc ferrocyanide ; ¹³⁴Cs ; Adsorption ; Radioactive waste
• 刊名：Nuclear Science and Techniques
• 出版年：2008
• 出版时间：April 2008
• 年：2008
• 卷：19
• 期：2
• 页码：88-92

文摘

Adsorption of ¹³⁴Cs from aqueous solution by zinc ferrocyanide, and the effect of experimental conditions on the adsorption were investigated. Preliminary results showed that zinc ferrocyanide was very efficient as an absorbent. Over 98 % of ¹³⁴Cs could be removed by zinc ferrocyanide of 0.33 g·L⁻¹ from ¹³⁴Cs solution (Co) of 3.2160.0 kBq·L⁻¹, with adsorption capacities (Q) of 9.6463.0 kBq·g⁻¹. The adsorption equilibrium time was within one hour and the suitable pH ranged 110. No significant differences on ¹³⁴Cs adsorption were obsrved at 050°C, or in solutions containing Ca²⁺, Fe³⁺, Mg²⁺, HCO₃⁻, CO₃^2- Cl⁻ and SO₄^2-, even though they are 1000 times higher than the anions or cations in groundwater. However, the adsorption rates decreased when solutions contained K⁺ or Na⁺. The adsorption process could be described by Freundlich and Langmuir adsorption equations.