The absorption and separation method of Xe and Kr gas by active carbon was investigated.A standard mixture of Xe and Kr flowed through the active carbon column to be absorbed and enriched at low temperature(-78 ℃).The absorbed Xe and Kr were then deabsorbed from the carbon column separately.The analysis of the experimental data shows that the recoveries of Xe and Kr are greater than 90%.It can be concluded that the decontamination coefficient for Xe from Kr environment is above 104,while the decontamination coefficient for Kr from Xe is no less than 103.

In order to monitor radioactive krypton distribution in the environment,active charcoal is used to enrich krypton before the sample can be submitted to further laboratory analysis.The importance and method of krypton enrichment were presented.The absorption behavior of krypton by charcoal was analyzed.The experimental setup was designed to investigate effects of working temperature,linear velocities,partial-pressure of krypton on the enrichment of krypton by charcoal.The micro-structure parameters of the absorbing material to characterize its absorbing property was used,and the experimental data with theoretical analysis to conclude that for CF-1450 was fitted.The saturation absorption capacity at 191 K is 32.9 mL/g.