USDA-ARS researchers have discovered that soybean hulls — as well as leftover stalks and stems from corn and sugar cane plants — make an ideal foundation for a potent filtering agent that can adsorb harmful levels of lead, chromium, copper and cadmium from contaminated waters. A two-step process converts the cheap and abundant crop residues into a powerful magnet that removes both positively and negatively charged particles of heavy metals in water for less cost than current technology.

For more, go to: http://www.dairyherd.com/directories.asp?pgID=675&ed_id=5563