Ion exchange device for water treatment, process for its fabrication and its use for removing nitrites and/or nitrates from water

摘要

The present invention relates to an ion exchange device for water purification or for improving water quality, preferably for reducing the nitrite and / or nitrate content, consisting of at least one exchange container with a basic anion exchanger in chloride and / or sulfate form arranged therein and at least one additional basic anion exchange layer in Hydroxyl form or layer containing hydroxyl groups, the anion exchange layers being arranged directly and / or with interposition of intermediate layers, filter layers or anion exchange containers, and the anion exchange layer (s) in chloride and / or sulfate form being arranged not as a mixed form but as a separate layer (s) or are. The chloride and / or sulfate ion-containing anion exchange layer is preferably arranged near or below the inlet opening, preferably below a filter layer and / or (in the direction of flow of the water to be cleaned) in front of the anion exchange layer in hydroxyl form or the hydroxyl group-containing anion exchange layer. The invention further relates to a method for producing the ion exchange device for water purification and use thereof for nitrate and / or nitrite removal in water.