Removal of radioactive cesium from solutions by zinc ferrocyanide

RADIOCHEMISTRY, RADIOPHARMACEUTICALS AND NUCLEAR MEDICINE

Removal of radioactive cesium from solutions by zinc ferrocyanide

LI Bing，

LIAO Jiali，

WU Jiaojiao，

ZHANG Dong，

ZHAO Jun，

YANG Yuanyou，

CHENG Qiong，

FENG Yue，

LIU Ning

Nuclear Science and Techniques

Vol.19, No.2

pp.88-92

Published in print 20 Apr 2008

DOI：10.1016/S1001-8042(08)60029-9

CLC：O614.35,X13

47201

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 3.2~160.0 kBq·L^-1, with adsorption capacities (Q) of 9.6~463.0 kBq·g ^-1. The adsorption equilibrium time was within one hour and the suitable pH ranged 1~10. No significant differences on ¹³⁴Cs adsorption were observed at 0~50℃, 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.

Zinc ferrocyanide134CsAdsorptionRadioactive waste

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