| Barrier Films for Cesium or Carbon Tetrachloride | ||
| Andy Warta1, Tsutomu Shimotori2, William A. Arnold2 and Edward L. Cussler Jr.1, (1)Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Ave SE, 151 Amundson Hall, Minneapolis, MN 55455, (2)Civil Engineering, University of Minnesota, 500 Pillsbury Dr S ERoom 122 CivE, Room 122 CivE, Minneapolis, MN 55455 We have built barriers for cesium ion and for carbon tetrachloride which can retard leaks out of landfills by over three hundred times. The barriers for cesium ion contain 50 µm particles of crystalline silicon titanate (CST) which selectively adsorb the cesium. The barriers for carbon tetrachloride contain 20 nm iron particles melt blended into polyethylene. The particles react with diffusing CCl4. In both cases, the barriers eventually do leak at close to the normal rate once the CST or the iron is consumed. The results support theories which predict the effect of other reactive barriers. Extended Abstract Status: File Uploaded | ||