Accession Number : AD0455814


Title :   STERILIZATION ACTION OF CHLORINE AND IODINE ON BACTERIA AND VIRUSES IN WATER SYSTEMS


Descriptive Note : Annual progress rept. 1 Mar 1964-28 Feb 1965


Corporate Author : JOHNS HOPKINS UNIV BALTIMORE MD SCHOOLOF HYGIENE AND PUBLIC HEALTH


Personal Author(s) : Kruse, Cornelius W ; Hsu, Yu-Chih ; Nomura, Shigeko


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/455814.pdf


Report Date : 28 Feb 1965


Pagination or Media Count : 13


Abstract : The inactivation of the bacterial virus f2 by iodination is greatly influenced by the presence of the iodide ion, upon the pH and temperature. The inactivation of the f2 phage is limited to about 90% of initial PFU/ml when the iodine to iodide is increased to a ratio of 1 to 100. When the iodine to iodide ratio is 1 to 1.2 or less phage is rapidly inactivated to almost completion (99. 9999%) in waters at 30 C and pH 7.0 or higher, whereas only 99.9% reduction is obtained in water of pH 7.0 or higher at 5 C. The extent and rate of inactivation is much reduced in waters of pH less than 7.0. Therefore, waters disinfected with the existing globuline tablet may inactivate enteric viruses at a significantly reduced rate especially in cold water areas. The infectious RNA activity is completely resistant to treatment with iodine. Concentration of 100 ppm of iodine applied for 10 minutes to phage yielded infectious RNA in quantities indistinguishable from that of normal phage.


Descriptors :   *DECONTAMINATION , *WATER TREATMENT , *IODINATION , IONS , TEMPERATURE , BACTERIA , PURIFICATION , IODINE , HALOGENATION , INFECTIOUS DISEASES , PH FACTOR , WATER SUPPLIES , CHLORINE , BACTERIOPHAGES , ENTEROVIRUSES


Subject Categories : Hygiene and Sanitation


Distribution Statement : APPROVED FOR PUBLIC RELEASE