Kildebidrag til luftforureningen med PAH og forekomsten af PAH i røggassen fra fluid-bed anlæg

The air pollution with polycyclic aromatic hydrocarbons (PAH) and basic azaarenes was investigated on different locations on Zealand. The highest levels were found in busy streets in Copenhagen, lower levels were found in a suburban area, and the lowest levels in a residential and a rural area. The concentrations of PAH were 10-100 times higher than those of basic azaarenes.

The PAH levels and the mutagenic activity of the suspended dust in the atmosphere were shown to correlate. The traffic was confirmed to be the dominating source of air pollution with polycyclic organic matter in streets. In a residential area the contribution from traffic was of the magnetude of 50% at winter.

The traffic contribution was calculated by means of the concentrations of benzo(ghi)perylene, coronene, and benzo(e)pyrene. The presence of PAH in the stack gas from two coal fired atmospheric fluidized bed plants, a 300 kW and a 2 MW plant, respectively, were investigated. The concentrations were acceptable and comparable with those found in similar sources, e.g. oil-fired central heating. (author) 8 tabs., 3 ills., 63 refs..