Management manner null of the water processing system due to the performance evaluation manner, and aforementioned manner of anion exchange

摘要

PROBLEM TO BE SOLVED: To realize stabilized management of a water treatment system by a method wherein an anion-exchange resin adsorbs polyethylene sulfonic acid previously and then the limit of use is evaluated for the anion-exchange resin by measuring the reaction rate thereof. ;SOLUTION: An anion-exchange resin is immersed into PSS aqueous solution of specified concentration and regenerated to OH type using sodium hydroxide. Reaction rate is then measured using the, regenerated resin. The PSS has molecular weight preferably in the range of 1600-50000 and more preferably in the range of 10000-50000. The ordinate represents the residual quantity of PSS in the resin after regeneration and the abscissa represents the reaction rate in the form of measurement of mobility coefficient of substance. Embodiments 1, 2, 3 represent the test results for a new product, a product used in an actual plant for three years, and a product used for one half year. The resin of embodiment 3 became useless one month later. Results of the embodiments 1, 2, 3 indicate the aging of resin. According to the method, limit of use can e predicted for anion-exchange resin and a water treatment system can be managed stably.;COPYRIGHT: (C)1997,JPO