Water Contaminant Treatments
Chromium
Drinking Water Sources of Chromium
Chromium is found in drinking water as a result of industrial waste contamination. The occurrence of excess chromium is relatively infrequent. Proper tests must be run on the water supply to determine the form of the chromium present. Trivalent chromium (Cr-3) is slightly soluble in water, and is considered essential in man and animals for efficient lipid, glucose, and protein metabolism. Hexavalent chromium (Cr-6) on the other hand is considered toxic. The US EPA classifies chromium as a human carcinogen. The current Drinking Water Standards MCL is .005 mg/I.
Treatment of Chromium
Trivalent chromium (Cr-3)can be removed with strong acid cation resin regenerated with hydrochloric acid. Hexavalent chromium (Cr-6) on the other hand requires the utilization of a strong base anion exchanger that must be regenerated with caustic soda (sodium hydroxide) NaOH. Reverse Osmosis can effectively reduce both forms of chromium by 90 to 97%. Distillation will also reduce chromium.
Water Filtration Solutions To Address Chromium
3M Aqua-Pure
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