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Organic pollutants can be taken up by plants and degraded by plant metabolic activities.The action of bacteria associated with plant roots may be useful in the control of pollutants.Recently we have begun work in the use of plants to destroy toxic compounds in munitions wastes.
Heavy metals give toxic effects on human health and cause several serious diseases.
Several techniques have been using for removing heavy metal contaminants from the environmental but these techniques have limitations such as high cost, long time, logistical problems and mechanical complexity.
Research into phytoremediation has intensified since the early 1990s.
Studies at the University of Washington have led the way in understanding plant activities against important toxic compounds such as trichloroethylene (number one on the Superfund list of prevalent groundwater pollutants) and carbon tetrachloride.
Edenspace Systems Corporation, the crop biotechnology company that markets the Edenfern, planted one fern for every square foot of contaminated space.
The ferns extracted arsenic over the course of their growing season, about five months, and then Edenspace harvested the fronds, leaving purified soil in place.For example, some trees adapted to growth on serpentine soils in the South Pacific, which are naturally high in nickel, take up the metal and concentrate it in their tissues, so much that the sap of the trees is a bright blue.This phenomenon has inspired scientists and engineers to propose to develop plants that can "hyperaccumulate" heavy metals in their above-ground tissues so that, by harvesting them, the metals can be economically removed in an ecologically friendly manner.This site stores nothing other than an automatically generated session ID in the cookie; no other information is captured.In general, only the information that you provide, or the choices you make while visiting a web site, can be stored in a cookie.In the early 2000s, homeowners in Washington, DC’s leafy Spring Valley neighborhood received some unwelcome news.The Army Corps of Engineers had discovered that the soil on 177 of the Spring Valley properties contained unsafe levels of arsenic, a remnant of World War I-era weapons testing in the area (1). Here, the fern known as Edenfern extracts arsenic from a contaminated backyard in Spring Valley, a residential neighborhood in Washington, DC. Here, the fern known as Edenfern extracts arsenic from a contaminated backyard in Spring Valley, a residential neighborhood in Washington, DC.Phytoremediation is the use of plants to clean up pollution in the environment, especially at hazardous waste sites.Plants can take up and accumulate toxic metals in their leaves where they can be disposed of easily.On highly contaminated properties, the Corps dug up yards and hauled soil away.On properties with lower arsenic levels, the Corps gave homeowners another option: the Edenfern.