The 16 EPA PAHs in 96 ash samples of biomass incineration plants were investigated.
The highest PAH content was observed in phytomass fly ash derived at 500 to 750 °C.
The LMW, MMW, HMW and total PAHs in ash correlated significantly.
The total PAHs present in ash increased with increased levels of unburned carbon.
The ashes suitable for soil applications as an organic amendment were suggested.