To: Zeev Hed who wrote (5588 ) 9/9/1998 11:30:00 PM From: Bob Jagow Respond to of 11603
They need chuka's NewTech, Zeev. ---------------------------------------------------- RESEARCHERS DRAW A BEAD ON TOXIC WASTE HUNGRY MOLECULES INHABITING PORES IN MINUSCULE CERAMIC beads could soon be cleaning up vast amounts of contaminated soil and water. Researchers at the Energy Dept.'s Pacific Northwest National Laboratory (PNL) in Richland, Wash., believe the beads may be the best pollution fighter yet. Ounce for ounce, the ceramic beads can gobble up more mercury or lead than anything else, says PNL scientist Jun Liu. It's hard to imagine, he explains, but a tablespoon sprinkled on a hazardous-waste site would act like a ''sponge'' with a surface area as big as a football field. And the molecules can be tailored for industrial chores, such as extracting precious metals from wastewater at mines and metal-finishing plants. The technology is called SAMMS--for self-assembled monolayers on mesoporous supports. The drawing shows a hexagonal section of porous surface. In the closeup on top, a molecule with oxygen, carbon, and hydrogen atoms (red, gray, and white, respectively) ends in a thiol group (yellow) that has latched onto a mercury ion (blue). PNL is working with Mobil Corp., which developed the process that stuffs the ceramic pores with molecules. And 3M is working on ways to embed beads in conventional membrane filters. Next year, PNL expects to launch SAMMS demonstration projects for metal finishing and mining . EDITED BY OTIS PORT ----------------------------------------------------------businessweek.com @@XGtkqGQA9*tKpwEA/premium/37/b3595136.htm 'SAMMS' is so "NewTech" that a Dogpile search yields nada ;) DrBob