Iodine sorption, measurement

So far we have studied PVA-Iodine complexes which are formed in PVA films soaked at low iodine concentrations at which iodine sorption and complex formation only take place in the amorphous phase. In this case, X-ray diffraction of PVA crystals remained without any change after the iodine soaking, as shown in Fig. 20 in the previous section. Although detailed X-ray measurement of... 

The samples were vacuum dried at room temperature for 12 hours before SAXS measurement. Iodine embedded cotton was prepared according to the iodine sorption test procedure proposed by Nelson et al. ( ). Soaking with glycerine was carried out at room temperature for 24 hours. 

Iodine Sorption. In this technique the amount of iodine absorbed by the sanple from an iodine/potassium iodide solution is measured. The method has been questioned by several researchers. For example, as the sanple vieight increases the equilibrium concentration of iodine in the solution falls and so does the amount of iodine absorbed by the sample (12). Other problems with the methods have been reviewed Wadsworth and Cuculo (30). 

CSE experiment a large iodine fraction had been deposited onto the vertical surfaces of the vessel. The reason for this difference in iodine behavior is assumed to be the comparatively small input of cesium in the CSE test (1.1 g cesium and 85.5 g iodine), compared to the ACE test (266 g cesium and 101 g iodine). As a consequence, there was insufficient cesium aerosol in the CSE test to adsorb most of the h vapor and iodine removal in this test was controlled by boundary-layer vapor diffusion and sorption onto internal surfaces. In the ACE experiment, the vapor - aerosol interaction process probably was complete within the time scale of the atmosphere mixing process (a few minutes). The estimated rate constants for I2 wall deposition were about 2.7 times those for aerosol settling this difference is consistent with the measured differences in the early-stage halftimes of iodine removal in the CSE and ACE experiments. 

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