Several methods are available such as phytoremediation, washing, eletrokinetic treatment, and vitrification etc. So, which technique is more feasible and effective?
I think phytoremediation is the most feasible method for removal of heavy metals from contaminated soil.
Tree species which are fast growing and hyper-accumulators can be used. Salix species have good potential to accumulate heavy metals but these are not too fast growing. Eucalyptus clones can be tried. Trees have an advantage over other phyto-accumulation methods.
I think phytoremediation is the most feasible method for removal of heavy metals from contaminated soil.
Feasibility of the methods depends on a number factors, including, budget costs, levels of the metals, etc. Phytoremediation is most prefered as it uses biological materials which have less environmental impacts.
phytoremediation appears to be the most eco-friendly method of re-mediating a heavy metal polluted soil. other methods include in-situ chemical oxidation and thermal oxidation.
phytoremediation appears to be the most eco-friendly method of re-mediating a heavy metal polluted soil. other methods include in-situ chemical oxidation and thermal oxidation.
Thanks everyone for their valuable suggestion. I am also agree that phytoremediation may be the most eco-friendly and feasible method but concerned about what should be done with those contaminated plants species? how to manage them?
This is not easy question to have a straightforward answer. Phytoremediation is likely feasible when relatively moderate to low pollution and a single element in question. Extremely high contamination does not allow any plant growth. In this case combination of at least two different methods may be used along with the phytoremediation. The phytoremediation is the cheapest methods but it is very time dependent process. It cannot be readily applied to any kind of heavy metal. I can therefore say that the better method is highly case sensitive.
Any of them have their own singularities. The choice depends on numerous factors such has budget, contaminant levels, which metals are envolved, soil porosity, drainage conditions, climate conditions, etc. It's impossible to answer that whitout knowing the in situ conditions. You should pay particular attention to contaminant levels if you want to use phytoremediation, otherwise your plants won't grow becouse of the toxixity levels.
The most efficient method for immobilization of heavy metals in the contaminated soil is the use of low-cost organic adsorbents.
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