Problem of dynamics sorption of polycyclic aromatic hydrocarbons (PAHs) was examined in the soil in 2000 for 16 PAH compounds recommended by EPA. They were examined using computer methods of concerning their sorption by the soil. PAHs and their soil sorption wise examined using computes methods. Samples were collected in the distance of 1.5 m from the shoulder of the roads with intensive traffic, i.e. Warszawska Street and Brzeska Street in the town of Siedlce. The analysis was performed by high performance liquid chromatography (HPLC) with reversed phases. In the investigation granulometrie composition of the matrix was taken into consideration.

Granulometrie composition of dust coming from main technological nodes - i.e. from the sinter plant, blast furnace and lead refinery - of the zinc smelter in Poland was investigated. Samples of dust trapped in bag filters were collected. The sieve analysis, sediment analysis and a laser analyzer of granulomeric composition were used in investigations. Mass and particle number contributions of the dust to nine granulometrie fractions having aerodynamic diameters in intervals: 0-2.5, 2.5-5, 5-10, 10-20, 20-32, 32-40, 40-63, 63-100, I 00-250 μm were determined. To determine mathematical functions describing (mass and particle number) changes in the fractional composition of each dust the results were statistically analyzed by applying the nonlinear estimation. Using of the polynomial regression provided a very good correlation between the sought functions and results of measurements. The results of measurements are presented in tables and charts. High degree of granulometrie diversity of the investigated dust samples, depending on the dust formation mechanisms, i.e. on the technology used and composition of raw materials, was noted. High share of the fine particles in the dust may be a serious hazard to human health, especially in the case of breakdown in functioning of dust collectors.