Abstract

CERTAIN SEAWEEDS CAN EFficiently take up TNT in coastal areas, providing a new twist to phytoremediation—the practice of using plants to remove pollutants from the environment. The finding was reported last week at the American Association for the Advancement of Science annual meeting in Washington, D.C. Some coastal training ranges may contain TNT from unexploded munitions, said Linda Chrisey program officer for Environmental & Marine Biotechnology at the Office of Naval Research (ONR). Seaweeds are excellent remediators, said Greg Rorrer, a chemical engineering professor at Oregon State University (OSU). He found that three types of seaweed actively remove TNT from the water in laboratory models. Red tropical algae take up 100% of 1.0 mg per LTNT in 72 hours. Red tropical, as well as green and red algae from temperate regions, take up TNT five to 10 times faster than other aquatic plants. The seaweeds also metabolize TNT. Rorrer and ...

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