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Methods of Treatment for Water Contaminants

Cadmium

Source of Cadmium

Cadmium enters the environment through a variety of industrial operations, it is an impurity found in zinc. By-products from mining, smelting, electroplating, pigment, and plasticizer production can contain cadmium. Cadmium emissions come from fossil fuel use. Cadmium makes its way into the water supplies as a result of deterioration of galvanized plumbing, industrial waste or fertilizer contamination.. The US EPA Primary Drinking Water Standards lists Cadmium with a 0.005 mg/l MCL.

Treatment of Cadmium

Cadmium can be removed from drinking water with a sodium form cation exchanger (softener). Reverse Osmosis will remove 95 - 98% of the cadmium in the water. Electrodialysis will also remove the majority of the cadmium.

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