Polycyclic aromatic hydrocarbons
- Harmful to the Environment! Toxic! Inevitable?
Polycyclic aromatic hydrocarbons (PAH) originate as by-products of incomplete combustion of organic materials, such as wood, petroleum and coal, when these materials are strongly heated in the absence of air. PAHs are also contained in refinery or coking plant products. In chemical terms, PAHs are a diverse group of aromatic substances composed of two to seven hydrocarbon rings. PAHs dissolve well in fats, bind to particles, and accumulate in organisms and the environment.