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Texte du rabat Source: Wikipedia. Pages: 27. Chapters: Constructed wetland, Hyperaccumulators table - 3, List of hyperaccumulators... Lire la suite
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Texte du rabat

Source: Wikipedia. Pages: 27. Chapters: Constructed wetland, Hyperaccumulators table - 3, List of hyperaccumulators, Restoration ecology, Phytoremediation, Hyperaccumulators table - 2 : Nickel, Environmental microbiology, Microbial biodegradation, Biotransformation, Rhizofiltration, S-200, Bioretention, Biosurfactant, Tree bog, Dehalococcoides, Mycoremediation, Folkewall, Desulfatibacillum alkenivorans AK-01, Mycofiltration, Treatment wetland, Applied ecology, Desulfococcus oleovorans Strain Hxd3, Xenocatabolism, Phytotreatment. Excerpt: Vertical Flow type of Constructed WetlandsA constructed wetland or wetpark is an artificial wetland, marsh or swamp created as a new or restored habitat for native and migratory wildlife, for anthropogenic discharge such as wastewater, stormwater runoff, or sewage treatment, for land reclamation after mining, refineries, or other ecological disturbances such as required mitigation for natural wetlands lost to a development. Natural wetlands act as a biofilter, removing sediments and pollutants such as heavy metals from the water, and constructed wetlands can be designed to emulate these features. Vegetation in a wetland provides a substrate (roots, stems, and leaves) upon which microorganisms can grow as they break down organic materials. This community of microorganisms is known as the periphyton. The periphyton and natural chemical processes are responsible for approximately 90 percent of pollutant removal and waste breakdown. The plants remove about seven to ten percent of pollutants, and act as a carbon source for the microbes when they decay. Different species of aquatic plants have different rates of heavy metal uptake, a consideration for plant selection in a constructed wetland used for water treatment. Constructed wetlands are of two basic types: subsurface-flow and surface-flow wetlands. Subsurface-flow wetlands can be further classified as horizontal flow and vertical flow constructed wetlands. Subsurface-flow wetlands move effluent (agricultural or mining runoff, tannery or meat processing wastes, wastewater from sewage or storm drains, or other water to be cleansed) through a gravel lavastone or sand medium on which plants are rooted. In subsurface-flow systems, the effluent may move either horizontally, parallel to the surface, or vertically, from the planted layer down through the substrate and out. Subsurface horizontal-flow wetlands are less hospitable to mosquitoes, whose populations can be a problem in constructed wetlands. Carnivorous plants hav

Informations sur le produit

Titre: Bioremediation
Code EAN: 9781155659336
ISBN: 1155659333
Format: Couverture cartonnée
nombre de pages: 100
Poids: 113g
Taille: H246mm x B189mm x T5mm
Année: 2012