Efficacy of Flocculating and Other Emergency Water Purification Tablets
2007
Powers, Edmund M.
Chlor-Floc (CF) emergency water purification tablets were tested for bactericidal, viricidal and cysticical efficacy; removal of turbidity and chemical agents in water at temperatures ranging from 5 deg C-to 25 deg C; and storage stability at 5, 25 and 40 deg C. The minimal required reduction was achieved for bacteria, Rotavirus, and Giardia, bu CF did not achieve the required reduction of Poliovirus at any of the temperatures or time periods investigated. Clarification of water was effective in turbid waters, but filtration through a cloth is necessary to prevent flocculated sediment from entering the canteen. Removal of chemical agents from water was a function of the solubility of the chemical agent, the rate of hydrolysis and the composition of the water. The free residual chlorine in CF tablets remained stable at 5 deg C-and 25 deg C for 27 months, but declined rapidly after three months at 40 0 C and three days at 60 deg C. To be acceptable to the Military, the tablets must be approved and registered by the EPA and must be stable during normal storage for three years. Commercial Item Descriptions have been written for CF tablets and for a kit containing tablets, filters, and a water treatment bag. Both may be procured through the Defense General Supply Center, Richmond, VA.... Water purification, Chlorine flocculating tablets, Water purification kit, Bactericidal tests, Iodine tablets, Water treatment, Chlor-Floc (CF), Tablets.
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