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Air
Purification Technology - Photoplasma, Photochemistry,
Ultraviolet Light |
| Photochemistry |
| Photochemistry,
used in these air purification systems, is the chemical
reaction or change in material caused by exposure
to light energy. Ultraviolet light in this range
is useful for disinfection purposes. When a strong
enough ultraviolet light is present, it becomes
useful in the destruction of contaminating organic
compounds. Almost all indoor contaminants are organic,
such as toxic volatile organic compounds, dust particles
like dander, hair, dust mite feces, etc., and biological
contaminants like bacteria, viruses, and fungi.
Photochemistry can break down these harmful organic
molecules. |
| Photoplasma
& Ultraviolet (UV) Light |
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These air purification systems excite gases by
the energy from ultraviolet light waves and create
a highly energized gaseous state. This resultant
plasma can destroy nearly all organic contaminants.
The destruction mechanism primarily involves the
photodissociation of molecular oxygen leading
to the formation of highly oxidizing species,
such as atomic oxygen, molecular singlet oxygen
and ozone. These reactive species interact with
contaminants converting most to carbon dioxide
and water.
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| Photoelectric
Effect |
| The
ejecting of electrons from a molecule by high energy
ultraviolet light is called the photoelectric effect,
and it can be further enhanced by irradiating what
is called a "photoelectron emitting member"
to eject more electrons. Such a photoelectron emitting
member is contained in Biozone Air Purifiers. The
photoelectrons ejected are used to charge fine particles
in a gas which are then removed from the air stream
as they attach to oppositely charged surfaces. This
electrically charging of dust and other particulates
can remove particles as small as .001 micron. It
should be noted that each of the electron ejections
can cause multiple ionization events. For example,
in the photoelectric effect, the photon undergoes
only one interaction, yet thousands of ionizations
can be caused by the resultant electron and its
products. |
| Ozone |
| These
air purifiers use a combination of photo ionization,
purifying plasma and hydroxl radicals along with
ozone that together provides safe and effective
air purification. |
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