METHOD FOR MODIFYING ORGANIC MEMBRANE, MODIFIED ORGANIC MEMBRANE, AND MODIFICATION DEVICE

摘要

Provided are: a method for modifying an organic membrane, the method being capable of deciding the timing of termination of the modification through a calculation of the degree of progress; a modified membrane obtained by the method; and a modification device for practicing the method. The modification method comprises bringing an organic membrane having a desalting function into contact with an oxidizing aqueous solution containing an oxidizing agent to thereby change the desalting performance and/or permeability of the organic membrane. In the method, the oxidizing aqueous solution is analyzed for oxidation-reduction potential (V) and oxidizing-agent concentration (mol/L), and the product (V·mol/L) of the oxidation-reduction potential and the oxidizing-agent concentration is time-integrated to calculate the integrated value of the product (V·mol·hr/L). After detecting the integrated value having reached a given value, the modification is terminated.