IRRADIATION EFFECTS ON PROPERTIES OF REVERSE-OSMOSIS MEMBRANE-BASED ON CROSS-LINKED AROMATIC POLYAMIDE

In order to develop a membrane suitable for reverse osmotic condensati on of radioactive liquid wastes, a new crosslinked aromatic polyamide composite reverse osmosis membrane (ROM) was irradiated in water, or i n wet system, and its mechanical and some thermal properties, and the separation performance for inorganic salt were investigated. A membran e was degraded by irradiation more severely in wet system than in dry system, probably due to the reaction with OH-radicals. In the separati on performance for NaCl, the salt rejection of the membrane was kept o ver 88% until irradiation reached 2MGy, maintaining about 90% of its o riginal water flux.