TY - JOUR
T1 - Permeable membranes containing crystalline silicotitanate as model barriers for cesium ion
AU - Warta, Andrew M.
AU - Arnold, Bill
AU - Cussler Jr, Edward L
PY - 2005/12/15
Y1 - 2005/12/15
N2 - In diaphragm cell experiments, a permeable model reactive barrier for the containment of cesium is tested. Primary targets for cesium containment are former plutonium processing sites (e.g., Hanford, WA and Savannah River, SC), which are currently contaminated with cesium-137. Adding up to 10 wt % crystalline silicotitanate, a sacrificial reagent, to poly(vinyl alcohol) films increases the time before cesium can cross the film by a factor of 30. The increased lag times are consistent with theories developed for this type of reactive membrane. Theory also correctly predicts the effects of cesium concentration and membrane thickness on membrane performance. Because the relative improvements of the model barrier are expected to be independent of the polymer used, these increased lags should hold for less permeable polymers that are more resistant to radiation, although these polymers have not been tested.
AB - In diaphragm cell experiments, a permeable model reactive barrier for the containment of cesium is tested. Primary targets for cesium containment are former plutonium processing sites (e.g., Hanford, WA and Savannah River, SC), which are currently contaminated with cesium-137. Adding up to 10 wt % crystalline silicotitanate, a sacrificial reagent, to poly(vinyl alcohol) films increases the time before cesium can cross the film by a factor of 30. The increased lag times are consistent with theories developed for this type of reactive membrane. Theory also correctly predicts the effects of cesium concentration and membrane thickness on membrane performance. Because the relative improvements of the model barrier are expected to be independent of the polymer used, these increased lags should hold for less permeable polymers that are more resistant to radiation, although these polymers have not been tested.
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U2 - 10.1021/es0509681
DO - 10.1021/es0509681
M3 - Article
C2 - 16475361
AN - SCOPUS:29244468880
SN - 0013-936X
VL - 39
SP - 9738
EP - 9743
JO - Environmental Science and Technology
JF - Environmental Science and Technology
IS - 24
ER -