What is KDF?
KDF (Kinetic Degradation Fluxion) process filter media are high purity copper-zinc granules that reduce water contaminants using oxidation/reduction (redox) reactions. They are used in pretreatment, primary treatment and wastewater treatment to maintain the system and extend the life of a system and reduce contamination by heavy metals, chlorine and hydrogen sulfide.
In what form is KDF available?
KDF 55 granular: designed for the extraction or removal of chlorine and heavy soluble metals. KDF 85 granules: used for the removal or elimination of iron and hydrogen sulfide.
How does KDF filter media work in water?
KDF filter media reduces or eliminates:
Chlorine, iron, hydrogen sulfide, lead, mercury, calcium carbonate, magnesium, chromium, bacteria, algae and fungi. The KDF medium exchanges electrons with the contaminants to reduce them to non-harmful components. During reactions, electrons are transferred between molecules and new elements are created.
Chlorine removal: KDF 55 media can remove about 99% of free chlorine by electro-chemical reduction of dissolved chlorine gas in water to its soluble form of chloride ions. For chlorine removal at points where it is applied, KDF media is incorporated in showerhead filters and kitchen water filter cartridges.
Iron extraction: KDF media extracts iron from water, alone or in combination with other technological treatments at the point of entry. The KDF medium acts as a catalyst that exchanges soluble ferrous cations to insoluble ferric hydroxide substances, which can be easily removed during backwashing.
KDF 85 media removes more than 90% of iron from groundwater. Sulfide hydroxide extraction KDF 85 medium removes H2S by converting hydrogen sulfide gas to the insoluble sulfide form which is inert and precipitates. When water contaminated with hydrogen sulfide enters the KDF filter, the copper in the KDF medium loses an electron and the sulfide gains an electron and copper sulfide and water are formed. Copper sulfide is insoluble in water and can be removed by backwashing the KDF filter media. Periodic backwashing removes precipitate buildup from the media bed.