Trends in the Accumulation of Benzo(A)Pyrene by Natural Grassy Vegetation in the Novocherkassk Power Station Impact Zone
The regularities of benzo(a)pyrene (BaP) accumulation by natural grassy vegetation under the aerotechnogenic emissions from the Novocherkasskaya Power Station were revealed for the first time on the basis of long-term monitoring studies. It is shown the BaP content in natural grassy vegetation is an indicator of technogenic pressure level on territories polluted mostly by products of hydrocarbon fuel combustion. The tendencies of BaP accumulation were studied in roots and vegetative parts of
... etative parts of natural grassy vegetation of the affected zone in the period from 2008 up to 2011, and the degree of natural grassy vegetation pollution was estimated according to the ratio of BaP content in the root to the vegetative part of plants. The results of BaP concentration determination in the plants of monitoring plots showed the same tendencies with BaP content in soil of monitoring plots. The accumulation of pollutant in plants occurs mainly along the prevailing wind direction of the winds rose and plots located in close proximity to the Novocherkassk Power Station from 2008 to 2011. BaP accumulation by plants growing around the emissions source is due, mainly, to the physicochemical properties of the soils of the monitoring plots, mainly by their granulometric composition. It was established the background values of BaP in the natural grassy vegetation were exceeded up to 1.4 to 8.7 times, depending on the degree of proximity of the monitoring plots to the emission source. BaP accumulation by plants has mainly soil source of uptake by root absorption. Effect of additional emission sources was revealed on the natural grassy vegetation of the remotest areas from the Novocherkassk Power Station during carrying out the complex studies of contaminated areas.