Water Purification

Iodine-releasing tablets and iodine tincture have been used for many years to decontaminate water and have been used by the United States Army since WWII. A weak aqueous solution of 3-5 ppm of elemental iodine can destroy a wide range of enteroviruses, ameobae and their cysts, bacteria and their spores, as well as algae. Under temperate conditions of 25°C the disinfection process takes 1 5 minutes, longer in colder conditions. Adding to the versatility of iodine as a water decontamination agent is its ability to act over a wide range of pH and still be effective in the presence of ammonia and amino ions from nitrogenous wastes that may be also present in the water (Kahn & Visscher 1975).

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