It is also an early pro- posal for the use of plants to remediate contaminated sites. Private companies have installed trees as a hydraulic control at many sites. Some of the contaminants may also form complexes with plant exudates and are subsequently transported by ground water Suthersan It is a compilation of research and remediation work that has been done to date.
Physical containment of contaminants by plants can take the form of binding the contaminants within a humic mol- ecule humificationphysical sequestration of The advantages of phytoremedation as occurs in some wetlands, or by root accumulation in nonharvestable plants.
A field or greenhouse study may be needed to make this determination. Plant Selection Process 45 Table The advantages, disadvantages, and current status of each process are also discussed. Tables of hyperaccumulators[ edit ]. Nonphytoremediative plants can be added to supplement ecological values such as soil stabilization or to provide a food source.
Properly designed and located, such landscaping could also provide long-term treatment and enhanced ecologi- cal habitats. This phyto- toxicity could lead to a tiered remedial approach in which high concentration waste is handled with expensive ex situ techniques that quickly reduce acute risk, while in situ Phytoremediation is used over a longer period of time to clean the high volumes of lower contaminant concentra- tions.
The plants can also excrete a substance that produces a chemical reaction, converting the heavy metal pollutant into a less toxic form.
However, preliminary studies have shown that these plants can be toxic to small animals such as snailsand, hence, plants involved in phytotransformation may need to be maintained in a closed enclosure. Metal concentrations in the shoots of accumulating plants can be —1,fold higher than in non-accumulating plants: For complete removal of contaminants from an area, the plants must be cut and disposed of elsewhere in a nonpolluting way.
Department of Energy sites contami- nated with metals and radionuclides. This Introduction is intended to provide a tool for site regulators, owners, neighbors, and man- agers to evaluate the applicability of phytoremediation to a site. The Superfund Innovative Technology Evaluation Pro- gram SITE demonstrates field-ready technologies that are initiated and installed by the developer of the technol- ogy.
For rhizofiltration to occur, the water must come into contact with the roots. Pollutants become less bioavailable, resulting in reduced exposure. Also included are frequently overlooked factors that should be considered in identifying the relative risks.
This document reports the results of phytoremediation efforts as originally reported by researchers. Phytoremediative plants with desirable ecological values could provide diversified habitat where appropriate. In evaluat- 10 ing such concerns, it is important to compare the relative ecological risks posed by phytoremediation to those risks already occurring on site or those risks posed by alterna- tive cleanup methods.
The increased polarity also allows for easy transport of the xenobiotic along aqueous channels.The advantages and disadvantages of phytoremediation as compared to other methods of remediation of polluted soils in situ are considered.
Examples of successful phytoextraction and phytomining for cleaning up of contaminated soils in Rasteburg (South Africa) and the phytostabilization of technogenic barrens nearby the copper-nickel plants in Sudbury (Ontario, Canada) and in the Kola Subarctic (Russia) are.
While the possible advantages of bioremediation and phytoremediation, by both recombinant the advantages of phytoremedation microbes and plants, have been extensively reviewed, the. phytoremediation B. Advantages and limitations. Advantages: the cost of the phytoremediation is lower than that of traditional processes both in situ and ex situ; the plants can be easily monitored; the possibility of the recovery and re-use of valuable metals (by companies specializing in "phyto mining").
The Advantages of Phytoremedation. 1, words. 7 pages. The Problem of Ozone Depletion and Its Results. 1, words. 7 pages. The Importance of Ground Water. 1, words. 3 pages. The Varied Uses of Adipic Acid in the World Today. 1, words. 3 pages.
The Potential Effects of a Depleted Ozone Layer. 2, words. The principal application of phytoremediation is for lightly contaminated soils, sludges and waters where the material to be treated is at a shallow or medium depth and the area to be treated is large, so that agronomic techniques are economical and applicable for both planting and harvesting.
Six Types of Phytoremediation. Share Flip Pin Email By Theresa Phillips. Updated July 13, Phytoremediation is a form of bioremediation and applies to all chemical or physical processes that involve plants for degrading or immobilizing contaminants in soil and groundwater.Download