Polycyclic Aromatic Hydrocarbons(PAHs) are organic chemicals having fused aromatic rings. A simple example of aromatic compound is Benzene. PAH can have 3, 4, 5, 6 or 7 benzene rings. There are more than 100 compounds listed under PAHs. Some examples of PAHs are:3-rings: Anthracene, Phenanthrene
The primary source of PAHs is incomplete combustion of carbon containing fuels such as wood, coal, diesel, tobacco etc. Some of the PAHs are markers for the source of pollution. For example Retene is primarily found in the smoke from the forest fire.
These PAHs are pollutants and they are carcinogenic to humans.
There are different methods to analyze these pollutants in laboratory. Our laboratory use gas chromatography-mass spectrometry for this purpose. They are found in soil, water, snow, vegetation, air. That means they are everywhere. These pollutants move from where they were produced. Researches have shown that the presence of PAHs in the atmosphere of remote places of the earth-Arctic region. This shows PAHs undergo long range transport. So no matter who is responsible for the production of such deadly pollutants, their bad effect is divided everyone in the earth.
I will write more specific information about these pollutants in upcoming blogs. Please visit science to society.