Phytoremediation Assignment Paper

Phytoremediation Assignment Paper

PHYTOREMEDIATION
this paper is not to write from scratch, it to add to and existing paper which will be uploaded the following information about phytormediation
you want to now use the model to analyze how the overall engineered ecological system behaves with regard to its significant biological process, resources or parameter that you have considered to be critical or limiting. This could include any physical or chemical processes that have been identified as being significant because it creates a critical or limiting condition to the biological process. Perform modeling analyses (run the model or perform calculations using the model) for conditions that you would consider typical, and then also for one or two other conditions above and below what is considered typical. The intent is to provide some demonstration of how the system is expected to perform under these different conditions; for example when stressed. If your model is one that has been previously used by others in the literature you are referencing, your results may include some of those results as well. Finally, you will provide a discussion of these results for how the overall system, by virtue of its critical or limiting processes, performs under the conditions you have analyzed.Phytoremediation Assignment Paper
n Step 10 your primary objective is to provide some closure to your entire work. Select the most import aspect of this work and discuss it in a manner that summarizes its significance with regard to the overall system, its individual processes and the intended application. Your work on this paper should have offered you the opportunity to begin developing your own ideas for alternate or similar applications, or even to further strengthen your ideas about the current application. Develop and present your conclusion about the work done and where appropriate, provide recommendations for future work that should be considered. Conclusions and recommendations do not need to be lengthy. The more direct and succinct, the better, as they should be obvious because of all the previous material and discussion leading up to them. Phytoremediation Assignment Paper

 

 

 

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Around the world, there is an increasing trend in areas of land, surface waters and groundwater affected by contamination from industrial, military and agricultural activities either due to ignorance, lack of vision, or carelessness. The build-up of toxic pollutants (metals, radionuclides and organic contaminants in soil, surface water and ground water) not only affects natural resources but also causes a major strain on ecosystems. Remediation of contaminated sites using conventional practices, such as ‘pump-and-treat’ and ‘dig-and-dump’ techniques, is often expensive, has limited potential, and is usually only applicable to small areas. Additionally, these conventional approaches to remediation often make the soil infertile and unsuitable for agriculture and other uses by destroying the microenvironment. Hence there is the need to develop and apply alternative, environmentally sound technologies (ESTs), taking into account the probable end use of the site once it has been remediate Phytoremediation Assignment Paper

Phytoremediation (‘phyto’ means plant) is a generic term for the group of technologies that use plants for remediating soils, sludges, sediments and water contaminated with organic and inorganic contaminants. Phytoremediation can be defined as “the efficient use of plants to remove, detoxify or immobilise environmental contaminants in a growth matrix (soil, water or sediments) through the natural biological, chemical or physical activities and processes of the plants”. Plants are unique organisms equipped with remarkable metabolic and absorption capabilities, as well as transport systems that can take up nutrients or contaminants selectively from the growth matrix, soil or water. Phytoremediation involves growing plants in a contaminated matrix, for a required growth period, to remove contaminants from the matrix, or facilitate immobilisation (binding/containment) or degradation (detoxification) of the pollutants. The plants can be subsequently harvested, processed and disposed.Phytoremediation Assignment Paper

Plants have evolved a great diversity of genetic adaptations to handle the accumulated pollutants that occur in the environment. Growing and, in some cases, harvesting plants on a contaminated site as a remediation method is a passive technique that can be used to clean up sites with shallow, low to moderate levels of contamination. Phytoremediation can be used to clean up metals, pesticides, solvents, explosives, crude oil, polyaromatic hydrocarbons, and landfill leachates. It can also be used for river basin management through the hydraulic control of contaminants. Phytoremediation has been studied extensively in research and small-scale demonstrations, but full-scale applications are currently limited to a small number of projects. Further research and development will lead to wider acceptance and use of phytoremediation.Phytoremediation Assignment Paper

 

There are several ways in which plants are used to clean up, or remediate, contaminated sites. To remove pollutants from soil, sediment and/or water, plants can break down, or degrade, organic pollutants or contain and stabilise metal contaminants by acting as filters or traps.

Phytoremediation Assignment Paper

Plant roots also cause changes at the soil-root interface as they release inorganic and organic compounds (root exudates) in the rhizosphere. These root exudates affect the number and activity of the microorganisms, the aggregation and stability of the soil particles around the root, and the availability of the contaminants. Root exudates, by themselves can increase (mobilise) or decrease (immobilise) directly or indirectly the availability of the contaminants in the root zone (rhizosphere) of the plant through changes in soil characteristics, release of organic substances, changes in chemical composition, and/or increase in plant-assisted microbial activity.The uptake of contaminants in plants occurs primarily through the root system, in which the principal mechanisms for preventing contaminant toxicity are found. The root system provides an enormous surface area that absorbs and accumulates the water and nutrients essential for growth, as well as other non-essential contaminants. Researchers are finding that the use of trees (rather than smaller plants) is effective in treating deeper contamination because tree roots penetrate more deeply into the ground. In addition, deep-lying contaminated ground water can be treated by pumping the water out of the ground and using plants to treat the contamination.Phytoremediation Assignment Paper

Phytoremediation is an alternative or complimentary technology that can be used along with or, in some cases in place of mechanical conventional clean-up technologies that often require high capital inputs and are labour and energy intensive. Phytoremediation is an in situ remediation technology that utilises the inherent abilities of living plants. It is also an ecologically friendly, solar-energy driven clean-up technology, based on the concept of using nature to cleanse nature.Phytoremediation Assignment Paper

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