Ozone treatment has evolved from water treatment to soil remediation. Recently, ozone has been used to clean up sites containing variety of soil contaminants. The reason for using ozone is to target those compounds that are not biodegradable or the ones which are biodegradable over a long period of time.
Many hydrocarbon compounds will biodegrade if they are dissolved, although these contaminants are not readily biodegraded by microorganisms if they are are on soil particles. This
is where using ozone technology can help the soil remediation process.
In addition to other reasons in some cases ozone soil remediation method is selected because of the network of water pipes and utility lines through a site makes it impossible to excavate the contaminated soil.
Often, when treated with ozone sites show 99% reduction of contaminants which is pretty incredible.
Key Benefits of Soil Remediation with Ozone:
Low capital equipment costs
Minimal site disturbance during installation
Low on-site profile
Low operating costs
In-situ destruction of targeted components
Rapid decrease of contaminant mass and concentration in soil and water - impressive results may be seen in weeks
No vapor control necessary - contaminants are destroyed rather than transferred from one phase to another
Clean reaction - no hazardous by-product formation. Micro-bubble size and means of introduction into the interstitial spaces of the
formation ensures maximum contact with contaminant.
Micro-bubbles act to extract VOCs from groundwater and soil pores which reduces soil oxidative demand common to liquid oxidants
Soil Contaminants Destroyed by Ozone:
Aliphatic and polyaromatic hydrocarbons
Soil contaminated with oil and fuel
Soil after treatment with Ozone
Key Ozone Features:
12 times more soluble than oxygen in water
Moves easily through the soil
Produced on-site, no need for hazardous chemical transportation or storage
Most powerful oxidizer available
Complex organics break down to carbon dioxide or less toxic molecules