Ion exchange

Abstract

This article discusses the nature and problems of organic compounds in demineralized, polished demineralized, and high purity water. It describes the effect of humic matter on end users. Ion exchange resins have been used for many years for treatment applications, and the effect of humic matter on demineraliser ion exchange resins and how to assess resin fouling are considered. The article describes a laboratory study conducted on ionic exchange resins and the impact of influent humic matter on resin properties such as regenerant dosage, operating capacity, rinse requirements, silica leakage levels. The study has shown that the relative performance of strongly basic anion resins with a TOC-containing feed can be estimated. The capabilities of an on-line TOC analyser together with on-line dilution device have been demonstrated, and appear to be applicable for process monitoring. (J.M.McLaughlin)