Phytoremediation is a specific kind of bioremediation that uses plants to remove contaminants from the air, water, or soil. The plants used in phytoremediation can be harvested and the absorbed toxins can therefore be completely disposed of in a responsible manner. This method of remediation is suitable for applications where other kinds of remediation strategies would be impossible, for example where the particles or materials are too fine or unstable to be removed mechanically. Other kinds of phytoremediation practices include those that use plants to absorb toxins from soil or water, which are then released into the air via evapotranspiration, and rhizofiltration where bacteria on plant rhizomes assist in the disposal of toxins. The plants used in phytoremediation vary according to the substance of particle for removal, and the unique abilities of particular plants to take up particular contaminants. The plants are all hyperaccumulators, and can bioaccumulate, degrade or render harmless the contaminants that they take up. Common plants used in phytoremediation are members of the Brassica (mustard) family, Helianthus Sp. (sunflowers) and members of the Populus (poplar) family. Phytoremediative tactics are the subject of ongoing research and experimentation.
No hay comentarios:
Publicar un comentario