ISSN 1064-2293, Eurasian Soil Science, 2017, Vol. 50, No. 3, pp. 296–304. © Pleiades Publishing, Ltd., 2017. Original Russian Text © A.P. Zhidkin, A.N. Gennadiev, T.S. Koshovskii, 2017, published in Pochvovedenie, 2017, No. 3, pp. 311–320. SOIL CHEMISTRY Input and Behavior of Polycyclic Aromatic Hydrocarbons in Arable, Fallow, and Forest Soils of the Taiga Zone (Tver Oblast) A. P. Zhidkin*, A. N. Gennadiev, and T. S. Koshovskii Moscow State University, Moscow, 119991 Russia *e-mail:
[email protected] Received August 5, 2016 Abstract⎯Contents of 11 most prevalent polycyclic aromatic hydrocarbons (PAHs) in snow and soils of ara- ble, fallow, and forest areas significantly remote from impact technogenic sources of polyarenes have been examined in the Torzhok district of Tver oblast. From the analysis of snow samples, the volumes and compo- sition of PAHs coming from the atmosphere onto the areas of different land use have been determined. Light hydrocarbons prevail in PAHs. They make up 65–70% of total PAHs; their share in soils reaches almost 95%. An increase in the content of PAHs is revealed in fallow soils compared to arable and afforested areas. A direct relationship is revealed between the lateral distribution of total PAHs and the content of organic carbon. The distribution of total PAHs is surface-accumulative in forest soils, mainly uniform in arable soils, and deep- accumulative in fallow soils. PAH groups characterized by similar radial distributions and ratios between their reserves in snow and soils are distinguished: (1) fluorene and phenanthrene, (2) biphenyl and naphthalene, (3) benzo(a)anthracene, chrysene, perylene, and benzo[a]pyrene, and (4) anthracene and benzo[ghi]pyrene.