Assessment of chemical soils contamination in the Khabarovsk small rivers water protection zones

The content of pollutants (benzapyrene, oil products, heavy metals and arsenic) in soils of the Khabarovsk small rivers water protection zones (Berezovaya, Krasnaya Rechka, Chernaya, Gnilaya Pad’ rivers) has been studied by the authors. Out of 25 soil samples, the excess concentration is stated for petroleum products (about 2 times) at only one key section of the Gnilaya Pad’ river; for benzapyrene (1.8-2.8 times) - at seven sections of the Gnilaya Pad’, Left and Right Berezovaya rivers. The authors have found arsenic contamination of soil in the Right and Left Berezovaya, Krasnaya Rechka rivers water protection zones. There is a clear tendency of exceeding the MAC of arsenic in soils with acidic reaction of the environment (pH <5.5). The authors give a comparative assessment of pollution for soil, surface water and bottom sediment by oil products and zinc along the Chernaya River and its tributary - Gnilaya Pad’. The accumulation of these toxicants in soils of coastal zones is \established to exceed the showings in surface waters and bottom sediments of the investigated rivers.