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Methods of Treatment for Water Contaminants

Aluminum

Source of Aluminum

Aluminum (Al+3) is an abundant metal in the Earth's surface, but its solubilty in water is so low that it is seldom a concern in municipal or industrial water systems. The majority of natural water contains from 0.1 ppm up to 9.0 ppm of Aluminum, however the primary source of Aluminum in drinking water comes from the use of aluminum sulfate (alum) as a coagulant in water treatment plants. The total dietary exposure to aluminum salts averages around 20 mg/day. Aluminum is on the US EPA's Secondary Drinking Water Standards list with suggested levels of 0.05 - 0.2 mg/l; dependent on case-by-case circumstances.

Treatment of Aluminum

Aluminum can be removed from water by a cation exchanger but hydrochloric acid or sulfuric acid must be used for regeneration to remove the aluminum from the resin. While this is suitable for an industrial application it is not recommended for domestic use unless it is in the form of a cation exchange tank. Reverse Osmosis will reduce the aluminum content of drinking water by over 98%. Distillation will reduce the aluminum content of water by over 99%. Electrodialysis is also very effective in the reduction of aluminum.

Products Related to Aluminum Water Treatment


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