Use “virgin” mixed bed ion-exchange resin packs containing monosphere beads with low TOC (such as Millipore Jetpore ion-exchange resin) only once and discard the pack after usage. This is an economically acceptable process provided that these packs are fed by pretreated water of good quality to limit the replacement frequency.
A good pretreatment should remove not only the bulk of ions to limit the burden of ionic contaminants reaching the resin pack, but also organics, particulates and colloids. This is required to prevent the build-up on the resin beads of a coating preventing the ions from accessing the ionic binding sites located mainly inside the beads’ porous structure.
Ion Exchange Water Purification Process, this is an economically acceptable process provided that these packs are fed by pretreated water of good quality to limit the replacement frequency.
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