Cesium (Cs) and strontium (Sr) removal as model materials in radioactive water by advanced reverse osmosis membrane

摘要

Reverse osmosis (RO) membrane is among the most powerful tools for solving the global water crisis, and Toray has developed high-performance RO membranes for seawater desalination, brackish water desalination, and wastewater reclamation by molecular design in the preparation of cross-linked aromatic polyamide membrane, which produces more appropriate water quality and quantity as compared with conventional ones. Several previous papers provided the removal performances of radioactive substances by RO membranes, but accurate data have not been reported about the advanced RO membranes. It is more recently desired to demonstrate Cesium (Cs) and Strontium (Sr) removal performance in radioactive water by RO membrane because of the considerable concern of the water quality control for nuclear power stations. In this study, removal performance of Cs, Sr, and Iodine was examined to use model compounds adding nonradioactive chemicals to seawater and analyzed by inductively coupled plasma mass spectrometry for ultra-trace detection. Consequently, Toray advanced seawater reverse osmosis membrane UTC-80R has high removal performance to reduce the concentration of Cs, Sr, and Iodine by less than one hundredth in high salinity water.