MICROPOROUS FILTER MEDIA, FILTRATION SYSTEMS CONTAINING SAME, AND METHODS OF MAKING AND USING.

摘要

The invention is directed to a microbiological interception enhanced filter medium, preferably having an adsorbent prefilter located upstream from the filter medium. Preferably, the prefilter is adapted to remove natural organic matter in an influent prior to the influent contacting themicrobiological interception enhanced filter medium, thereby preventing loss of charge on the filter medium. The microbiological interception enhanced filter medium is most preferably comprised of fibrillated cellulose nanofibers, in particular, lyocell nanofibers. At least a portion of the surface of the at least some of the nanofibers have formed thereon a microbiological interception enhancing agent comprising a cationic metal complex. A filter medium of the present invention provides greater than about 4 log viral interception, and greater than about 6 log bacterial interception.