Bibliothèque Électronique Lac Saint-Pierre

Polychlorinated biphenyls in St. Lawrence River sediments

Kaiser, K.L.E. et Oliver, B.G. et Charlton, M. N. et Nicol, K.D. et Comba, M.E. (1990). Polychlorinated biphenyls in St. Lawrence River sediments. The Science of the Total Environment , 97-98 (c). p. 495-506. DOI: 10.1016/0048-9697(90)90259-W.

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Résumé

Sediment cores from six stations and sediment trap samples from seven stations in the riverine lakes of the St. Lawrence River have been analyzed for chlorobenzenes, organochlorine pesticides and polychlorinated biphenyls (PCBs). The sediment cores were sectioned into the top three 1 cm sections, which were analyzed individually. Three of the sediment cores were from the same sites as the sediment traps. The results indicate the presence of di-, tri-, tetra-, penta- and hexachlorobenzene isomers, γ-chlordane, DDE and DDT, and PCB residues in most of the suspended and bottom sediments. PCB in the bottom sediments made up, on average, 81 ± 11% (n = 18) of the total organochlorine burden. PCBs had a mean concentration of 135 ± 138 ng g-1 (range 10-530 ng g-1; n = 18) in the core samples and were highest in Lac St. Francois and Lac St. Louis. In sediment trap samples, PCBs made up, on average, 78 ± 13% (n = 7) of the total organochlorine burden. PCB concentrations had a mean of 53 ± 40 ng g-1; n = 7) in the trapped suspended particulates and were highest below Ile St. Regis and in Lac St. Pierre.

Type de document: Article scientifique
Statut du texte intégral: Autre
Mots-clés libres: Bottom sediment; Contaminant; Desorption; Organochlorine; PCB; PCBs; Pesticide; Solubilisation; Solubilization.
Sujets: 8. Impacts et monitoring > 8.1. Qualité de l’eau
Date de dépôt: 05 août 2016 15:17
Dernière modification: 05 août 2016 15:17
URI: http://belsp.uqtr.ca/id/eprint/293

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