| 摘要 |
A process for making a water softening membrane and a process for using the same is described. The membrane is prepared by treating a polyamide reverse osmosis membrane with a strong mineral acid. Preferably, the membrane is then treated with a rejection enhancing agent. The resulting membrane at transmembrane pressures of 50 psi can attain a magnesium sulfate rejection with a 0.2 percent aqueous solution of more than 90 percent with a water flux of more than 610 liters per square meter per day (15 gallons per square foot per day). 35,018-F |
