Assessment of the history of pop pollution in lake Iacob, Danube delta, based on radionuclide-dated sediments
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504.455.054:621.039:574(091) (1)
Threats to the environment (910)
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PĂNESCU, Vlad Alexandru, ENEL, Antoine, BEGY, Robert, BELDEAN-GALEA, Mihail Simion. Assessment of the history of pop pollution in lake Iacob, Danube delta, based on radionuclide-dated sediments. In: Ecological and environmental chemistry : - 2022, Ed. 7, 3-4 martie 2022, Chișinău. Chisinau: Centrul Editorial-Poligrafic al USM, 2022, Ediția 7, Vol.1, p. 118. ISBN 978-9975-159-07-4.. 10.19261/eec.2022.v1
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Ecological and environmental chemistry
Ediția 7, Vol.1, 2022
Conferința "Ecological and environmental chemistry 2022"
7, Chișinău, Moldova, 3-4 martie 2022

Assessment of the history of pop pollution in lake Iacob, Danube delta, based on radionuclide-dated sediments

CZU: 504.455.054:621.039:574(091)

Pag. 118-118

Pănescu Vlad Alexandru1, Enel Antoine2, Begy Robert1, Beldean-Galea Mihail Simion1
 
1 Babeș-Bolyai University,
2 École Supérieure de Physique et de Chimie Industrielles (ESPCI), Paris
 
Disponibil în IBN: 9 martie 2022


Rezumat

The aim of this work is to assess the history of POP pollution in Lake Iacob from Danube Delta using sediments dated with the 210Pb and 137Cs radionuclides. The amount of 16 Polycyclic aromatic hydrocarbons (PAHs), 20 Organochlorine Pesticide (OCP), and 5 Polychlorinated biphenyl (PCB), were determined in each dated sediment layer by gas chromatography (GC) coupled with mass spectrometry for PAHs and electron capture detector for OCP and PCB. Prior GC analysis the target compounds were isolated from the sediment matrices by ultrasound assisted extraction subsequent by extract purification by open column chromatography. The ages of the sediment layer were determined using alpha and gamma spectrometry and by measuring the amount of 137Cs and application of the 210Pb dating method for the entire sediment column. PAH diagnostic ratios, HCH isomer ration, and sum of DDT and Chlordane metabolites were used as a tool for identification and assessment of the pollution emission sources. The results of the study showed that the POP concentrations detected in sediment samples ranged from 73.81 to 214.54 ng g-1 for PAH, 71.78 to 192.69 ng g-1 for OCP, and 49.4 to 162.3 ng g-1 for PCB, being well correlated with the Danube River flow rate. As conclusion, the analysis of POP residue in sediments is a suitable method to estimate the pollution history of surface water sources.

Cuvinte-cheie
historical pollution, Iacob Lake, Danube Delta, Polycyclic aromatic hydrocarbon (PAH), Organochlorine Pesticide (OCP), Polychlorinated biphenyl (PCB), radionuclides dated sediment