The invention has two primary portions, a means to provide ultra-violet radiation and a means for adsorbing organic, inorganic and, optionally, pathogens. The means to provide ultra-violet radiation comprises ultra-violet light sources emitting, at least in part, in the spectrum around 265 nm. Light emitting devices, including light emitting diodes and other solid state light emitting devices are available in this range as well. The adsorbent portion comprises several different adsorbent media, including zeolites, titanium dioxide (TiO.sub.2), alumina, carbon, micro- and/or nano-porous carbon, other minerals with a naturally occurring micro- and/or nano-porous structure, synthetic, including organic, substrates with a micro- and/or nano-porous structure, and surface-modified variations of the preceding adsorbents.