摘要
Adsorption of ^(134)Cs from aqueous solution by zinc fcrrocyanide,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 ^(134)Cs could be removed by zinc ferrocyanide of 0.33 g·L^(-1) from ^(134)Cs 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 ^(134)Cs adsorption were observed at 0～50℃,or in solutions containing Ca^(2+),Fe^(3+),Mg^(2+),HCO_3^-,CO_3^(2-),Cl and SO_4^(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 Frcundlich and Langmuir adsorption equations.
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 Ca^2＋, Fe^3＋, Mg^2＋, HCO^-3, CO^2-3, Cl and SO^2-4, 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.
