WATER - Clear Polluants - New Material Shows Promise for Trapping Pollutants soak up negatively-charged pollutants from water -an ion exchange process

SLUG-26 - copper hydroxide ethanedisulfonate -two-dimensional sheets with a high capacity for holding onto negative ions provides a positively-charged substrate that can exchange a nontoxic negative ion for the negatively-charged pollutants.
sodium ions weakly attached to a negatively - charged resin are exchanged for the hard-water minerals, which are held more tightly by the resin
To be used to trap the radioactive metal Technetium - a major concern for long-term disposal of solid radioactive waste that can leach out into the groundwater
http://www.sciencedaily.com/releases/2011/09/110906134011.htm