engleski

Distribution of persistent organochlorine compounds in one-year and two-year-old pine needles

The aim of this study was to investigate the distribution of organochlorine pesticides and seventeen PCB congeners in pine needles and to evaluate differences in one- and two-year-old needles. HCB, gamma-HCH, DDE, PCB-28, PCB-52, PCB-101, PCB-138, PCB-153 and PCB-118 were found in all one- and two-year-old needle samples. The concentration of organochlorine pesticides ranged between 0 (below determination limit) and 4 ng/g in one-year-old needles and between 0.05 and 10.4 ng/g in two-year-old needles. The concentration of indicator PCBs in one-year-old needles ranged between 0 (below determination limit) and 5.83 ng/g and between 0.15 and 9.91 ng/g in two-year-old needles. The remaining PCB congeners ranged between 0 (below determination limit) and 1.49 ng/g in one-year-old needles and between 0 and 2.49 ng/g in two-year-old needles. In all needles concentration medians follow the same order. Our results suggest that the patterns of organochlorine compounds in one- and two-year-old needles are similar, but the levels of organochlorine compounds in two-year-old needles are higher due to longer exposure to air pollution. Also, our results suggest that over the two years, air pollution was the same because the same patterns of organochlorine compounds were found in two generations of needles.

organochlorine pesticides; polychlorinated biphenyls; PCB congeners; hexachlorocyclohexane; hexachlorobenzene; DDE; DDD; DDT; pine needles; air pollution

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