MADDOX - Ion Exchange Catalyst in Water Treatment

• Effective removal of Iron, Manganese, Hydrogen Sulfide, Aluminum, Arsenic, Reactive Silica, over a wide pH range.
• No harmful effects from a chorine feed.
• Low attrition loss for long bed life.
• Formation of Hydroxyl Ion increasing pH. Additions of alkalising agents largely becomes unnecessary.
• Stripping of CO₂ and H₂S will also increase pH.

Maddox Catalystis formulated from Manganese ore and activated in special propietary furnaces, capable of removing iron, manganese, aluminum salts, tannins, chlorides and hydrogen sulfide from water through oxidation and filtration. Soluble iron, manganese, etc., are oxidized and precipitated by contact with higher oxides of manganese on the Maddox granules. The hydrogen sulfide is eliminated by oxidation to sulfate and an insoluble precipitate. Precipitates are then filtered and removed by backwashing. When the oxidizing capacity power of the Maddox bed is exhausted, the bed can be regenerated if required with a weak potassium permanganate (KMnO4) solution thus restoring the oxidizing capacityof the bed. Potassium permanganate in 1.75 to 3.5% solution, to regenerate Maddox bed. It is advisable toregenerate the bed for at least one hour after which to vigorously backwash for a few minutes until the permanganate color is removed, when it is placed in service and before oxidation capacity is totally exhausted. New research has revealed that Maddox can continuously be regenerated with the use of low and medium intensity U/V lamps with a minimum generation of 3 gms. of Oxygen and 2 gms. of Ozone per hour, wattage dependant on water volumes. Some installations just use air scour. It is important that the Maddox media has suitable underbedding
and attention must be paid to the configuration of media depths and area.