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CH3041
PAH I
• PolycyclicAromatic Hydrocarbons
contain two or more fused
aromatic rings. At least 8 of
the PAHs are possible carcinogens.
contain two or more fused
aromatic rings. At least 8 of
the PAHs are possible carcinogens.
• The simplest is napthalene that is
used in mothballs. Problem ones are C10 ® C24
• PAHs form during incomplete
combustion.
Forest
fires, volcanic eruptions, diesel
engines, cigarettes, barbeques, coal-fires.
engines, cigarettes, barbeques, coal-fires.
• Either built up from small hydrocarbon radicals by pyrosynthesis or by breakdown of large hydrocarbons by pyrolysis
(cracking)
