What is Phytotransformation process?
Phytotransformation, also referred to as phytodegradation, is the breakdown of organic contaminants sequestered by plants via: (1) metabolic processes within the plant; or (2) the effect of compounds, such as enzymes, produced by the plant.
What is meant by phytoextraction?
The use of plants to remove contaminants from the environment and concentrate them in above-ground plant tissue is known as phytoextraction.
Which plants are used in phytoextraction?
Study on four crop plants—Brassica rapa, Helianthus annuus, Zea mays, and Cannabis sativa—has been reported to determine their ability as hyperaccumulators for phytoextraction. The results showed that all four plants exhibited heavy metal accumulations in shoots, particularly of Cd, Cu, Ni, Pb, and Zn.
What is phytoextraction and how does it work?
Phytoextraction is a subprocess of phytoremediation in which plants remove dangerous elements or compounds from soil or water, most usually heavy metals, metals that have a high density and may be toxic to organisms even at relatively low concentrations.
What is biostimulation used for?
Biostimulation refers to the addition of rate limiting nutrients like phosphorus, nitrogen, oxygen, electron donors to severely polluted sites to stimulate the existing bacteria to degrade the hazardous and toxic contaminants.
What is the meaning of rhizofiltration?
Rhizofiltration is the adsorption onto plant roots or absorption into plant roots of contaminants that are in solution surrounding the root zone (rhizosphere). Rhizofiltration is used to decontaminate groundwater. Plants are grown in greenhouses in water instead of soil.
What is Phytomining used for?
Phytomining is used to extract copper from soil containing its ore. Phytomining is slow, but it: reduces the need to obtain new ore by mining. conserves limited supplies of more valuable ores with higher metal content.
What are the advantages of Phytomining?
| ADVANTAGES | DISADVANTAGES |
|---|---|
| The process is more environmentally friendly than traditional extraction methods. | Less profit is made from bioleaching which means it is less appealing to buisness men and women. |
Why is phytoextraction useful?
Phytoextraction is the use of plants to take up contaminants from soil or water, and translocate and accumulate those contaminants in their aboveground biomass (Salt et al., 1995; Jacob et al., 2018).
Why is Phytomining important?
What is biostimulation and bioaugmentation?
Bioaugmentation is the process of adding specific microorganisms to enhance the existing populations and promote biodegradation process while biostimulation is the process of adding electron acceptors, electron donors, or nutrients to stimulate naturally occurring microbial populations in the contaminated area.
What is the process of biostimulation?
Biostimulation involves the modification of the environment to stimulate existing bacteria capable of bioremediation. This can be done by addition of various forms of rate limiting nutrients and electron acceptors, such as phosphorus, nitrogen, oxygen, or carbon (e.g. in the form of molasses).
Which plant is used for Rhizofiltration?
A few examples of plants that are employed for rhizofiltration are sunflower, tobacco, spinach, rye and Indian mustard. Plant species besides hyperaccumulators can also be used, as the heavy metals need not be translocated to the shoots (Henry, 2000).
What is rhizosphere and Rhizoplane?
rhizoplane – the root surface including associated soil particles (Estermann and McLaren 1961; Clark 1949) rhizosphere – the zone of chemical, biological, and physical influence generated by root growth and activity.
What is the process of Phytomining?
Meaning. Phytomining is a process of extracting minerals from their ore using plants then using electrolysis in solution to extract the metal form the mineral.
What is the method of Phytomining?
Phytoextraction (phytomining) plants are grown in soil that contains low grade ore. the plants absorb metal ions through their roots and concentrate these ions in their cells. the plants are harvested and burnt. the ash left behind contains metal compounds.
What is used in Phytomining?
What are the advantages and disadvantages of phytoextraction?
Phytoextraction is slow but it:
- reduces the need to obtain new ore by mining.
- conserves limited supplies of high-grade ores.
- reduces the amount of rock waste that must be disposed of after traditional mining.
Which bacteria is used in bioaugmentation?
Table 1
| Pollutant | Bioaugmented Bacteria |
|---|---|
| Quinoline | Bacillus sp. |
| Quinoline | Burkholderia pickettii |
| Pyridine and quinoline | Paracoccus sp. and Pseudomonas sp. |
| Quinoline and Pyridine | Paracoccus sp. and Pseudomonas sp. |
What is the full meaning of biostimulation?