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Soil Remediation Techniques
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Soil Washing
A technique involving the use of water, sometimes mixed with chemical additives, to remove contaminants by washing the soil. It's particularly useful for treating soils with heavy metals and other inorganic contaminants.
Phytoremediation
Utilizes plants to absorb, concentrate, and/or degrade pollutants from soil and water. This is especially useful for sites with low to moderate contamination levels, like areas affected by agricultural runoff.
Solidification and Stabilization
Contaminants are immobilized within the soil matrix by adding binders, reducing the mobility of the pollutants. This method is often used for waste containing heavy metals and radionuclides.
Chemical Oxidation
This process involves adding chemical oxidants to the soil to break down contaminants, particularly organic compounds. Use cases include treatment of soils contaminated by petroleum hydrocarbons or industrial solvents.
Bioremediation
This is the use of microorganisms to degrade environmental contaminants into less toxic forms. It's often used to treat soil that has been contaminated by oil spills or industrial activity.
Thermal Desorption
Soil is heated to volatilize water and organic contaminants which are then condensed or captured by air treatment systems. Best for soils contaminated with volatile organic compounds.
Electrokinetic Remediation
Electric current is applied to move charged particles in the soil, which can mobilize and extract heavy metals and other inorganic pollutants. It's particularly effective in clayey and other low-permeability soils.
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