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- W2078954555 abstract "Some nuclear effluents contain traces of radioactive elements in sodium salt media, from which radioactive cesium must be separated. Various processes (among them liquid/liquid extraction and ion exchange) can perform such separation, but they produce additional wastes. Therefore, nanofiltration has been selected as a new separation process that may allow a large volume reduction without generating additional wastes. Nanofiltration is a pressuredriven membrane process, between ultrafiltration and reverse osmosis, that can separate species at the ionic scale. To perform the separation of cesium from highly salted aqueous medium, a nanofiltration process was combined with a cesium- selective complexation step. Ligands that were known to be highly cesium-selective in organic solvents were synthesized and modified in order to make them hydrosoluble. Ligands such as resorcinarenes or calixarenes were then tested through a nanofiltration system. One of them allowed cesium removal of 90% in an aqueous medium containing 250 g/L of sodium nitrate. By combining two such nanofiltration-complexation stages, it is now possible to remove 99% of trace-level radioactive cesium." @default.
- W2078954555 created "2016-06-24" @default.
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- W2078954555 date "2001-06-30" @default.
- W2078954555 modified "2023-09-26" @default.
- W2078954555 title "CESIUM/SODIUM SEPARATION BY NANOFILTRATION-COMPLEXATION IN AQUEOUS MEDIUM" @default.
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- W2078954555 doi "https://doi.org/10.1081/ss-100103636" @default.
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