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Quoting:Novel water purifier works without chlorine; eyed for produce washing
University of Delaware researchers have developed an inexpensive, nonchlorine-based technology that can remove harmful microorganisms, including viruses, from drinking water.
UD's patented technology incorporates highly reactive iron in the filtering process to deliver a chemical “knock-out punch” to a host of notorious pathogens, from E. coli to rotavirus. The new technology could dramatically improve the safety of drinking water around the globe, particularly in developing countries.
Besides helping to safeguard drinking water, the UD technology may have applications in agriculture. Integrated into the wash-water system at a produce-packing house, it could help clean and safeguard fresh and “ready to eat” vegetables, particularly leafy greens like lettuce and spinach, as well as fruit, according to Kniel. http://www.newfarm.org/news/2007/0315.shtml#water