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 organi c matter in an influent prior to the influent contacting themicrobiological interception enhanced filter medium, thereby preventing loss of charge on th e filter medium. The microbiological interception enhanced filter medium is mo st preferably comprised of fibrillated cellulose nanofibers, in particular, lyocell nanofibers. At least a portion of the surface of the at least some o f 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.