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Residues of persistent organic pollutants in Estonian soils

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Author(s): Kumar, Kurunthachalam Senthil | Priya, Mahalakshmi | Sajwan, Kenneth S. | Kõlli, Raimo | Roots, Ott

Journal: Estonian Journal of Earth Sciences
ISSN 1736-4728

Volume: 58;
Issue: 2;
Start page: 109;
Date: 2009;
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Keywords: soil | rural | urban | oil shale | pesticides | PCBs | PBDEs

ABSTRACT
Organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs), and polybrominated diphenyl ethers (PBDEs) were analysed in selected Estonian soils. The sample collection included agricultural-rural (Ahja, Eerika), industrial-urban (Kohtla-Järve, Muuga, Kunda), and reference sites (Lahemaa and Vilsandi). The PCB concentrations were greater in Ahja-1982 and Kohtla-Järve station 1, while Eerika, other Kohtla-Järve, Muuga Port, Kunda, Lahemaa, and Vilsandi Island concentrations were low. Organochlorine pesticides were slightly higher at Kohtla-Järve stations and PBDEs at Kunda stations. Overall, the predominant contaminants were PCBs (0.43–89 ng/g dw), followed by OCPs (0.21–16 ng/g dw) and PBDEs (< 0.01–3.2 ng/g dw). The occurrence of 4,4'-DDT in some samples indicated recent contamination by DDT of Estonian soils. The PBDEs in Estonian soils were reported for the first time.
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