HEAVY-METALS AND POLYCYCLIC AROMATIC-HYDROCARBONS (PAHS) IN A RURAL-COMMUNITY LEEWARDS OF A WASTE INCINERATION PLANT

In a rural community (Stephanskirchen, Southern Germany) near a waste incineration plant 7 soils, sewage sludge, waste incineration residues , the gutter sediment of a family home, and mosses were sampled to det ermine the total concentrations of Cd, Pb, Zn and 20 PAHs. Representat ive samples were used to measure NH4NO3- and EDTA-extractable Cd, Pb, and Zn as well as 20 PAHs in particle size separates (clay, silt, fine and coarse sand). Sites near the main road, hill top, and forested si tes contain up to 1.24 mg Cd, 888 mg Pb, and 279 mg Zn per kg. The hea vy metal concentrations of the sewage sludge, the gutter sediment, and especially the waste incineration residues are extremely high (up to 57 mg Cd, 3300 mg Pb, and 5700 mg Zn per kg). The extractability of Pb and Zn with NH4NO3 is low (< 5%), that with EDTA is high (up to 71.2% of total Cd, 82.5% of total Pb, and 47.2% of total Zn). The sum conce ntrations of PAHs range between 0.4 and 470 mg kg(-1). The sift has th e highest PAH concentrations of the particle size separates. High satu ration of organic matter with PAHs in the sand indicates high recent P AH deposition. Selected ratios of single PAHs reveal diesel and gasoli ne exhausts as main sources for PAH. Principal. component and cluster analysis show that the pollutant pattern depends on the C-org concentr ation and on the time passed since deposition. There is no significant influence of the waste incineration emissions on:the heavy metal and PAH concentrations.