Ground water contamination has become a significant environmental problem over the last few decades. Industrial, commercial and residential activities have allowed contaminants to enter the subsurface and contaminate the water with toxic chemicals. Over time the extent of this contamination has become more widely recognized as analytical techniques have discovered low level contaminants judged to be dangerous.
Ozone and ozone based advanced oxidation, have been used successfully to remove toxic compounds from ground water. These ozone based oxidation systems have been used in both:
It is important to recognize that for ISCO the environment underground is complex in terms of anthropogenic compounds and naturally occurring compounds, the phases in which the compounds exist, the nature of the rock/soil, etc. So, not only do the proper chemicals need to be added, but also the proper method of injecting them into the ground must be determined. Pump and treat applications have the advantage of a simpler treatment environment since it is limited to the water coming from the well.
There are other chemical oxidation approaches for both ISCO and pump and treat application including permanganate, hydrogen peroxide, Fenton’s Reagent (Fe based catalysis of hydrogen peroxide) and persulfate. In pump and treat applications UV can be used alone or in conjunction with ozone, peroxide, or ozone and peroxide.
The reactivity of ozone and ozone based advanced oxidation processes with various compounds found in ground water can be seen at the ozone ground water reactions link.
Depending on the chemical compounds to be treated and the hydrology of the site, different methods have advantages and disadvantages. A consistent advantages of ozone versus other approaches include:
Spartan Environmental has teamed with Product Recovery Management (PRM) to provide complete ozone ground water treatment systems. This means in addition to the ozone related equipment we can supply containerized packages with well pumps and other treatment technologies to provide a turnkey solution.