Lc. Dinescu et Og. Duliu, Heavy metal pollution of some Danube Delta lacustrine sediments studied byneutron activation analysis, APPL RAD IS, 54(5), 2001, pp. 853-859
Using neutron activation analysis and radiometric measurements, the vertica
l distribution of six possible pollutant elements (Zn, Cr, Co, As, Sb and B
r), two trace elements of natural origin (Sc and Hf) and radioactive Cs-137
were determined in three lakes, Furtuna, Lung and Mesteru, located in an a
ctive sedimentary zone of the Danube Delta. The accumulation rate of recent
sediments was estimated from radiocesium profiles. Zn, As, Sb and Br were
identified as possible pollutants. The vertical profiles of their concentra
tions reflect recent historic inputs, showing a gradual increase until arou
nd 1990, followed by a continuous decrease. (C) 2001 Elsevier Science Ltd.
All rights reserved.