Oxidation Potential of Ozone
||Oxidation Potential, (eV)
||explosive in water
||- very short half life (nano-seconds)
- can be created using ozone, hydrogen peroxide & UV light
||- rapidly combines with itself to form O2, or combines
with an O2 molecule to form O3
- can be created via corona discharge & UV ozone generation
||- excellent oxidizer in water or air
- reverts back to oxygen
- ideal for chemical synthesis & ozonolysis reactions
||liquid application only
||- primary ingredient in toilet bowl
- can give of toxic chlorine gas
||- very toxic & poisonous
- disagreeable odor
||- considered a weak acid
||- used primarily for bleaching pulp
The oxidation potential of ozone is 2.07 electron volts (eV).
It is one of the most powerful oxidants available for water treatment.
* The first three oxidants (fluorine, hydroxyl radical and
nascent oxygen) were are not shown the the charge b/c they are not considered to
be base oxidants. All except fluorine, which is explosive in water, are
created when 2 or more oxidants are utilized.
As one can easily see, ozone is the most powerful oxidant vs.
the other listed. The
In an aqueous solution, ozone may act on various compounds (M) in the
following two ways (Hoigné and Bader, 1977a, 1977b, 1978):
- by direct reaction with the molecular ozone, and
- by indirect reaction with the radical species that are formed when ozone
decomposes in water.
The two basic reactions of ozone in water are illustrated in the figure below.
[Reactivity of ozone in Aqueous Solution (Langlais et al.;
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