Selective Removal of Strontium and Cesium from Simulated Waste Solution with Titanate Ion-Exchangers in a Filter Cartridge Configuration-12092.

摘要

Commercial processes frequently use ion exchange materials in a continuous process featuring either a packed column or a cartridge filter configuration. To prevent hydraulic problems such as high pressure drops across the column, the particle size of the ion-exchanger must be relatively large, which reduces particle packing and, therefore, overall efficiency. In a cartridge filter design, the ion-exchanger is incorporated into an inert, porous material that allows faster solution flow. Relative to the packed column, the cartridge design can employ an ion-exchanger with much smaller particle size, which enhances denser particle packing. Given the smaller particle size and denser packing, the diffusion distances between particles is expected to be minimized leading to more efficient adsorption. The net effect is greater utility of the ion exchanger and higher throughput.