Iodine for the Disinfection of Water

Abstract

This article discusses several studies on the use of iodine for the disinfection of water: the 1958 study of the effectiveness of iodine for the disinfection of swimming pools at the University of Florida; the 1963 study of two water systems serving three prisons at Lowell, Florida; and, the 1964 study of the presence of pollution and the role that iodine might play as a viricide in the water system of Gainesville, Florida. The article briefly discusses a sensitive and reproducible colorimetric method for the determination of iodine, iodide, and iodate ion residuals in water. The method allows for the accurate determination of iodine in the presence of a coexisting free or combined chlorine residual. With simple modification, a free chlorine residual may be rapidly and accurately determined without interference from high concentrations of combined chlorine, at relatively high water temperatures. Total chlorine is determined by the addition of iodide and the combined chlorine is obtained by the difference.

Oxidation of Iodide and Hypoiodous Acid in the Disinfection of Natural Waters

“…Black et al (16) suggested that the product of the oxidation of HOI/OIby O3 or HOCl is IO3 -. In contrast, they did not find IO3as a product of the reaction of HOI with NH2Cl.…”

Iodine Disinfection of Water

“…At an iodine concentration of 1 mg/liter (1 ppm), the water met all standards for safety and palatability (1962 USPHS Drinking Water Standards) , 8 In additional observations we have noted that a distinct taste is imparted to water by iodine concentrations of 2 mg or more per liter.…”

Sustained release of iodine from a polymeric hydrogel device for water disinfection

“…Since 1950s numerous reports have been published on disinfection efficiencies of various forms of iodine. [3][4][5][6] More recently, iodine-based disinfection has been used by NASA in space flights. Compounds of iodine have been tried for more regulated release of iodine.…”