Soil Reclamation Through Chemical Oxidation
Supplying ozone (chemical) oxidation equipment to clean soil and groundwater is Kerfoot Technologies’ specialty. In the past, contaminated soil was dug and removed to a disposal location. Present-day engineering relies increasingly on smart in-situ technologies with minimal site disturbance. Chemical oxidation is at the forefront of those technologies.
What is chemical oxidation? Oxidation is a common, everyday chemical reaction. Iron rusts. Apples turn brown. Sugar is burned during physical exercise. These reactions occur upon exposure to oxygen. There are other substances that cause oxidation, such as ozone and peroxide. They decompose organic compounds to carbon dioxide and water. The results of oxidation of chlorinated organics are carbon dioxide, water, and chlorides. This is chemical oxidation.
When do we use it? In principle, all pollutants that are sensitive to oxidation are candidates for this method of clean-up. Dissolved solvents and polycyclic aromatic hydrocarbons are especially receptive to oxidation. Therefore ozone and peroxide oxidation technology is particularly useful for clean-up of drycleaners, gas stations, and gas manufacturing plant sites. Using chemical oxidation, one can clean a site quickly and effectively.
What can Kerfoot Tech offer? Kerfoot Technologies offers its two patented oxidation processes: C-Sparge™ and Perozone™. Both technologies are extremely effective for the pollutants listed below. The remediation systems are sold, or leased for pilot tests. As well as the standard systems, Kerfoot Technologies also offers custom-designed systems for a specific site’s needs. Consultants are licensed for use of the processes on a particular site.
How do the processes work? The ozone sparging process employs nano- to micro-sized bubbles of air-encapsulated ozone, created by forcing an air/ozone mixture through Spargepoints® into soil or groundwater. The ozone oxidation process may be further enhanced by coating the air/ozone bubbles with a liquid oxidant (Perozone ™). The microbubbles are pulsed through the soil and groundwater, yielding rapid clean-up. After reacting, ozone and Perozone™ both decompose to beneficial oxygen.
C-SpargeTM (microbubble ozone)
O3 + 2H+ + 2e- —> O2 + 2H2O
PerozoneTM (peroxide-coated ozone)
2O3 + H2O2 —> 2OH· +3O2
The following compounds have been effectively treated with C-SpargeTM and PerozoneTM technology: