Accumulation of 210Po by the Black Sea bottom sediments

First determinations of 210Po concentrations in the bottom sediments from the Ukrainian part of the Black Sea were carried out in 1998-1999. In the 0-1 cm layer, they range from 11.3 to 495.6 Bq centre dot kg-1 dry weight. Maximum concentrations were found in the circumferential regions of the Black-Sea western cyclonic water circulation zone. In the coast bottom sediments collected along the Crimea and northern-western part of the Black Sea, 210Po concentrations vary from 11.3 to 88,9 and, in the Sevastopol Bays, from 17.6 to 42.1 Bq centre dot kg-1 dry weight, They were higher near the Dnieper River Mouth (123.6 Bq centre dot kg-1 dry weight) and Bosporus Strait (108.7 Bq centre dot kg-1 dry weight)